Answer: Electronegativity is the tendency of an atom to attract electrons in a molecule
Explanation:
Write the symbol of the most abundant isotope of potassium. How many neutrons does it contain?
The most abundant isotope of potassium is potassium-39, which has the symbol K-39 or simply ³⁹K,there are 20 neutrons.
To find the number of neutrons in this isotope, follow these steps:
1. Determine the atomic number of potassium: Potassium's atomic number is 19, which means it has 19 protons.
2. Refer to the isotope notation: Potassium-39 indicates it has a mass number of 39.
3. Calculate the number of neutrons: Subtract the atomic number (protons) from the mass number:
Number of neutrons = Mass number - Atomic number
Number of neutrons = 39 - 19
Number of neutrons = 20
So, the most abundant isotope of potassium, K-39, contains 20 neutrons.
learn more about Potassium refer: https://brainly.com/question/14513133
#SPJ11
Arrange the following samples in order of increasing number of oxygen atoms:
1 mol H (lower) 2 then O
1 mol CO (lower)2
3x10^23 molecules O (lower)
Calculate the number of moles of carbon dioxide CO₂ produced by 3.5 Moles of Baking Soda NaHCO3.
1NaHCO3 + 1HC2H302—>1NaC2H3O2 + 1CO2 + 1H2O
Answer: The number of moles of carbon dioxide produced by 3.5 moles of baking soda is 3.5 moles.
Explanation:
How many atoms are equal to 1. 5 moles of helium?
Therefore, there are 9.033 × [tex]10^{23[/tex] atoms in 1.5 moles of helium.
The number of atoms in a mole (6.02 1023) of any material. We must use the conversion factor to change the number of atoms to the number of moles: The mole, often known as mol, is a SI unit that counts the particles in a given material.
A fixed amount of atoms are measured in a mole. Mole conversions are possible for quantities like grammes and milligrammes. However, because a mole is the sum of all the atoms, it does not have a gramme or milligramme equivalent.
The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which is equal to 6.022 × [tex]10^{23[/tex] particles per mole.
The number of atoms in 1.5 moles of helium, we can multiply the number of moles by Avogadro's number:
Number of atoms = 1.5 moles × Avogadro's number
Number of atoms = 1.5 moles × 6.022 × [tex]10^{23[/tex] atoms/mole
Number of atoms = 9.033 ×[tex]10^{23[/tex] atoms
Learn more about moles visit: brainly.com/question/29367909
#SPJ4
in a certain chemical reaction compound combines with compound to produce compound (and no other products). measurements were taken of the amounts of and present before and after a reaction that produced some : compound initial amount final amount calculate the theoretical yield of . round your answer to the nearest . suppose the percent yield of in this reaction was . calculate the actual amount of that was isolated at the end of the reaction. round your answer to the nearest . 2.0 g 6.6 g
The theoretical yield of compound is 2.0 g, and the actual amount of compound isolated at the end of the reaction is 1.32 g.
Based on the information given, the theoretical yield of compound would be calculated as follows:
1. Determine the limiting reactant by calculating the moles of each compound:
Moles of compound = initial amount of compound / molecular weight of compound
Moles of compound = 2.0 g / (molecular weight of compound)
Moles of compound = x g / (molecular weight of compound)
The limiting reactant is the one that produces the smallest amount of product. In this case, we will assume that compound is the limiting reactant.
2. Calculate the theoretical yield of compound:
Theoretical yield of compound = (moles of limiting reactant) x (molecular weight of compound)
Theoretical yield of compound = (moles of compound) x (molecular weight of compound)
Theoretical yield of compound = (2.0 g / molecular weight of compound) x (molecular weight of compound)
Theoretical yield of compound = 2.0 g
The theoretical yield of compound is 2.0 g.
Next, we need to calculate the actual amount of compound that was isolated at the end of the reaction:
Actual yield of compound = percent yield x theoretical yield
Actual yield of compound = 0.66 x 2.0 g
Actual yield of compound = 1.32 g
To know more about the theoretical yield refer here :
https://brainly.com/question/30700754#
#SPJ11
Balance the following equation in basic solution using the lowest possible integers and give the coefficient of hydroxide ion.
AlH4-(aq) + H2CO(s) → Al3+ (aq) + CH3OH(aq)
The given chemical equation is an unbalanced redox reaction that takes place in basic solution. The oxidation state of Al changes from -1 to +3, while that of C changes from +2 to -2.
To balance the equation, we first balance the number of carbon and hydrogen atoms on each side by adding a coefficient of 2 in front of H₂CO. This gives:
AlH₄-(aq) + 2H₂CO(s) → Al₃+ (aq) + 2CH₃OH(aq)
Next, we balance the hydrogen and oxygen atoms in the equation by adding OH- ions. We add four OH- ions to the right-hand side of the equation to balance the hydrogen atoms, and two more OH- ions on the left-hand side to balance the oxygen atoms. This gives:
AlH4-(aq) + 2H₂CO(s) + 6OH-(aq) → Al₃+ (aq) + 2CH₃OH(aq) + 4H₂O(l)
The balanced equation has a coefficient of 6 for OH- ions, which indicates that 6 hydroxide ions are needed to balance the reaction in basic solution.
Learn more about oxidation state,
https://brainly.com/question/31688257
#SPJ4
Which compound will experience the largest change in temperature during evaporation for 30 seconds at room temperature?
a CH3CH2CH3
b CH4
c CH3CH2CH2CH2CH3
Answer: CH4
Explanation: Methane
which of the following are isoelectronic with s^2-? a. Ar b. b Ca2+ с. A13+ d. K
Isoelectronic species have the same number of electrons. To determine which option is isoelectronic with S^2-, let's first find the number of electrons in S^2-. Sulfur (S) has 16 electrons in its neutral state. With a 2- charge, it gains 2 extra electrons, making it have 18 electrons.
Now, let's compare the given options:
a. Ar (Argon) has 18 electrons in its neutral state, so it is isoelectronic with S^2-.
b. Ca2+ (Calcium ion) has 20 electrons in its neutral state. With a 2+ charge, it loses 2 electrons, making it have 18 electrons. Thus, it is isoelectronic with S^2-.
c. Al3+ (Aluminum ion) has 13 electrons in its neutral state. With a 3+ charge, it loses 3 electrons, making it have 10 electrons. It is not isoelectronic with S^2-.
d. K (Potassium) has 19 electrons in its neutral state. It is not isoelectronic with S^2-.
So, the species isoelectronic with S^2- are a. Ar and b. Ca2+.
Learn more about Isoelectronic here:
https://brainly.com/question/6807313
#SPJ11
Which of the following elements have 1 unpaired electron in the ground state? (Select all that apply.)
a. B
b. Al
c. S
d. Cl
The correct answer is B (Boron) and Al (Aluminum).
To determine this, we need to examine the electron configurations of each element:
a. B (Boron) - Electron configuration: 1s² 2s² 2p¹
b. Al (Aluminum) - Electron configuration: 1s² 2s² 2p⁶ 3s² 3p¹
c. S (Sulfur) - Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁴
d. Cl (Chlorine) - Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁵
The elements with 1 unpaired electron in the ground state are:
a. B (Boron) - has 1 unpaired electron in the 2p orbital
b. Al (Aluminum) - has 1 unpaired electron in the 3p orbital
So, the correct answer is B (Boron) and Al (Aluminum).
To know more about ground state, refer
https://brainly.com/question/30546051
#SPJ11
How does the addition of water cause melting?
a. it heats the rocks
b. it decreases the pressure on the rocks
c. it increases the temperature while decreasing the pressure
d. it changes the location of the liquid-solid boundary
The addition of water causes melting by changing the location of the liquid-solid boundary (option d).
Melting is the process of a solid turning into a liquid due to an increase in temperature or a decrease in pressure. In the context of rocks, the presence of water lowers the temperature at which rocks melt.
Water molecules can break the bonds between the rock's mineral components, reducing the energy needed for the solid rock to transition into a liquid state. As a result, the rock melts at a lower temperature than it would without the presence of water.
The location of the liquid-solid boundary is the point where the solid rock and liquid rock (magma) are in equilibrium. By adding water, the temperature at which the rock will melt decreases, causing the liquid-solid boundary to shift to a different temperature and pressure.
In summary, the addition of water causes melting by changing the location of the liquid-solid boundary. This occurs because water lowers the melting temperature of rocks, allowing them to transition into a liquid state at lower temperatures than they would without the presence of water.
To learn more about liquid-solid boundary, refer:-
https://brainly.com/question/28026550?
#SPJ11
what is basaltic lavas?
Basaltic lavas are a type of lava that is low in viscosity, rich in iron and magnesium, and primarily composed of basaltic magma. They are commonly found in volcanic regions around the world and are characterized by their dark color and fine-grained texture.
Basaltic lavas are a type of lava that is primarily composed of basaltic magma. Basaltic magma is a type of magma that has low viscosity and is rich in iron and magnesium. This type of magma is produced by melting the mantle, which is the layer beneath the Earth's crust.
When basaltic magma reaches the Earth's surface, it flows out as a thin and runny lava. Basaltic lava flows are typically characterized by their low viscosity and can travel long distances before cooling and solidifying. Basaltic lavas are usually dark in color and have a fine-grained texture.
Basaltic lavas are some of the most common types of lavas found on Earth. They can be found in many volcanic regions, including Hawaii, Iceland, and the Columbia River Plateau in the United States. Basaltic lava flows have been known to be dangerous, especially if they flow rapidly and unpredictably.
Learn More about viscosity here :-
https://brainly.com/question/2568610
#SPJ11
Calculate the [h ] for a 0. 0473 m solution of barium hydroxide, ba(oh)2 assuming complete dissociation of the compound
The hydrogen ion concentration ([h]) for a 0.0473 m solution of Barium hydroxide, [tex]Ba(OH)2[/tex] assuming complete dissociation of the compound is 0.0946 mol/L.
The symbol [h] typically refers to the hydrogen ion concentration in a solution.
The balanced equation for the solution of barium hydroxide is
[tex]Ba(OH)_{2} (s)[/tex] → [tex]Ba_{2}[/tex](aq) + 2OH-(aq)
Here [tex]Ba(OH)_{2}[/tex] dissolves completely. The concentration of barium hydroxide and OH- will be equal to the concentration [tex]Ba(OH)2[/tex] originally added to the solution
The OH- concentration will be calculated as:
[OH-] = 2 × 0.0473 mol/L
[OH-]= 0.0946 mol/L
[h] = [H+] = [OH-] = 0.0946 mol/L
Therefore, we can conclude that the hydrogen ion concentration ([h]) is 0.0946 mol/L.
To learn more about Barium hydroxide
https://brainly.com/question/31327057
#SPJ4
How many grams of NaCI (sodium chloride) (molar mass = 58.0 g/mol) would be needed
to prepare 40 ml of 0.25 M NaCI solution?
I need the steps…
We must first determine the number of moles of sodium chloride we require in order to respond to this issue. To accomplish this, we can apply the molarity formula: Molarity is calculated as moles of solute/volume of solution.
The molarity in this instance is 0.25 M, the solute's molecular weight is unknown, and the solution's volume is 40 mL. To solve for moles of solute, we can change the formula: moles of solute = molarity x volume of solution.
As a result, 10 moles of solute are equal to 0.25 M times 40 mL. Since we now know how many moles of sodium chloride are required, we can use its molar mass (58.0 g/mol) to determine how many grammes are required. The following equation might be used: mass of solute = moles of solute x.
Mass of solute = moles of solute x molar mass of solute is the formula we can apply. Mass of solute is therefore equal to 10 moles times 58.0 g/mol, or 580 grammes. In conclusion, 40 mL of a 0.25 M NaCI solution requires 580 grammes of sodium chloride.
Learn more about moles at:
https://brainly.com/question/26416088
#SPJ1
27. Identify the chemical equation that corresponds to the first ionization energy (IE,) of the chlorine atom: A. Clh (g)+ eCl2 B. Cl2 (g)+2e2 CI C. Cl (g)+ C (g) D. Cl (g)C (g)+e E. Cl2 (g)Cl2 (g)+ e
The chemical equation that corresponds to the first ionization energy (IE) of the chlorine atom is option A, which is Cl(g) + e- → Cl+(g).
Ionization energy is the energy required to remove an electron from an atom or ion in the gaseous state. The first ionization energy of chlorine represents the energy required to remove one electron from a chlorine atom in the gas phase to form a positively charged ion (Cl+). Among the given options, only option A represents this process. In this equation, Cl(g) represents a chlorine atom in the gas phase, e- represents an electron, and Cl+(g) represents a positively charged ion of chlorine in the gas phase. Therefore, the correct answer is option A.
learn more about ionization energy
https://brainly.com/question/20658080
#SPJ11
a hill coefficient (nh) of 3 means b. the binding of a ligand makes it harder to bind the next ligand which in turn makes it harder to bind the third ligand. c. the binding of ligands is uncooperative. d. the system is at equilibrium. e. none of the above.
A hill coefficient of 3 indicates that b. the binding of a ligand becomes increasingly harder with each subsequent binding.
The phenomenon in which binding of a ligand becomes increasingly harder with each subsequent binding known as positive co-operativity, where the binding of one enhances the binding of the next. Therefore, it becomes more difficult to bind the next ligand after the first and even more difficult to bind the third.
A ligand is an ion or molecule which holds the ability to donate the electrons to the central metal atom or ion so that the coordination complex can be formed as a product.
Hence, a hill coefficient of 3 indicates that b. the binding of a ligand becomes increasingly harder with each subsequent binding.
Learn more about ligand : https://brainly.com/question/27731806
#SPJ11
write the acidic equilibrium equation for hbro. be sure to include the proper phases for all species within the reaction.
The acidic equilibrium equation for HBrO (hypobromous acid) is: HBrO (aq) ⇌ H⁺ (aq) + BrO⁻ (aq). It represents the reversible dissociation of HBrO into hydronium ions (H⁺) and hypobromite ions (BrO⁻) in aqueous solution.
The acidic equilibrium equation for HBrO (hypobromous acid) can be written as follows:
HBrO (aq) ⇌ H⁺ (aq) + BrO⁻ (aq)
In this equation, HBrO is the acid (in aqueous solution), while H⁺ and BrO⁻ are the conjugate base and acid, respectively. The double arrow (⇌) indicates that the reaction can proceed in either direction, and the (aq) notation indicates that all species are in aqueous solution.
The acidic equilibrium equation for HBrO (hypobromous acid) can be written as follows:
HBrO (aq) ⇌ H⁺ (aq) + BrO⁻ (aq)
In this equation, HBrO is the acid (in aqueous solution), while H⁺ and BrO⁻ are the conjugate base and acid, respectively. The double arrow (⇌) indicates that the reaction can proceed in either direction, and the (aq) notation indicates that all species are in aqueous solution.
To know more about the acidic equilibrium refer here :
https://brainly.com/question/10038290#
#SPJ11
The equilibrium equation for HBrO, an aqueous solution, is HBrO (aq) ↔ H+(aq) + BrO-(aq). This illustrates that HBrO can dissociate into H+ and BrO- ions and vice versa.
Explanation:The acidic equilibrium equation for HBrO, or Hypobromous acid, starts by indicating its state as aqueous (aq). The equation is HBrO (aq) ↔ H+(aq) + BrO-(aq). This equation shows the acid (HBrO) ionizing into H+ ions and BrO- ions in water. The symbol ↔ is used to show that the reaction can proceed in both directions, hence it's an equilibrium. In other words, HBrO can dissociate into H+ and BrO- and these ions can also recombine to form HBrO. This is a characteristic process in acid-base chemistry which is typically described by the Brønsted-Lowry definition of acids and bases.
Learn more about Acidic equilibrium equation here:https://brainly.com/question/31635874
#SPJ11
Compare the reactivity of methyl benzoate and phenol under bromination conditions. Classify each as an activating or deactivating group and explain your reasoning. Hint: draw out the complete structure of each showing all lone pairs.
Hi, I'm happy to help you compare the reactivity of methyl benzoate and phenol under bromination conditions. Methyl benzoate (an ester) is less reactive than phenol (an alcohol) in bromination reactions. This is because the ester group (COOCH3) in methyl benzoate is a deactivating group, withdrawing electron density from the benzene ring and making it less nucleophilic.
Conversely, the hydroxyl group (OH) in phenol is an activating group, donating electron density to the benzene ring and increasing its nucleophilicity.
To further understand this, we can draw out the complete structures of both molecules and analyze the lone pairs. Methyl benzoate has a lone pair on the oxygen atom of the ester group, which participates in resonance with the carbonyl group, decreasing electron density on the benzene ring. Phenol has a lone pair on the oxygen atom of the hydroxyl group that can resonate with the benzene ring, increasing electron density and making it more susceptible to electrophilic aromatic substitution reactions like bromination.
For more information on Methyl benzoate see:
https://brainly.com/question/10213530
#SPJ11
20 Jonathan is testing the solubility of cerium(III) sulfate in water under different conditions. The water solubility curve of cerium(III) sulfate is shown below. Solubility Curve for Cerium(III) Sulfate Solubility (g/100 g H₂O) 15- J 20 0004 0005 0006 0007 0008 60 40 Temperature (°C) nathan will observe the rate of dissolution of 3.0-gram solid samples of the compound under the eight different sets of conditions described in the table below. Sample Particle Size Temperature Magnetic (°C) Stirrer? 0001 15 Yes 0002 15 No 0003 50 Yes 50 No 15 Yes 15 No 50 Yes 50 No 80 Powder Powder Powder Powder Large crystals Large crystals Large crystals Large crystals 100 Which of Jonathan's samples will most likely exhibit the highest rate of dissolution? F 0005 G 0003 H 0007 0004
The concentration of a solute's saturated solution at the specified temperature determines how soluble it is in a given solvent is called its solubility .
Thus, As a weight ratio concentration (or mass ratio concentration), solubility data for a solubility curve is often represented in units of grams of solute per 100 g of solvent (g/100 g).
A substance's solubility is determined by: the type of the solute (intermolecular forces);The solvent's nature (intermolecular forces). temperature (Le Chatelier's Principle & Solubility)
Solubility For a specific temperature (often 25°C), rules (charts) and solubility tables (tables of solubility) are typically provided for a substance's solubility in water.
Thus, The concentration of a solute's saturated solution at the specified temperature determines how soluble it is in a given solvent is called its solubility .
Learn more about Solubility, refer to the link:
https://brainly.com/question/29661360
#SPJ1
true/false. An addition polymer is formed when two monomers containing bonds react in the presence of a(n) initiator.
True, An addition polymerization is a process in which monomers containing carbon-carbon double bonds (such as ethene) react with an initiator (such as a radical) to form a polymer with a long chain of repeating units.
In an addition polymerization, two monomers containing double or triple bonds react in the presence of an initiator, which helps initiate the reaction.
The initiator can break the double or triple bonds, allowing the monomers to form new single bonds and create a polymer chain.
Learn more about addition polymerization
brainly.com/question/27354910
#SPJ11
calculate the mass, in grams, of each of the following. 3.15 mol agno3 0.0901 mol cacl2 11.86 mol h2s g
The mass of 3.15 mol of AgNO₃ is 533.6 grams, the mass of 0.0901 mol of CaCl₂ is 10.02 grams, and the mass of 11.86 mol of H₂S is 404.5 grams.
To calculate the mass in grams of each of the given substances, we need to use the molar mass of each compound. The molar mass of AgNO₃ (silver nitrate) is 169.87 g/mol, the molar mass of CaCl₂ (calcium chloride) is 110.98 g/mol, and the molar mass of H₂S (hydrogen sulfide) is 34.08 g/mol.
To calculate the mass of 3.15 mol of AgNO₃, we can use the following formula:
mass = moles x molar mass
mass = 3.15 mol x 169.87 g/mol
mass = 533.6 g
Therefore, the mass of 3.15 mol of AgNO₃ is 533.6 grams.
Similarly, to calculate the mass of 0.0901 mol of CaCl₂, we can use the formula:
mass = moles x molar mass
mass = 0.0901 mol x 110.98 g/mol
mass = 10.02 g
Therefore, the mass of 0.0901 mol of CaCl₂ is 10.02 grams.
Finally, to calculate the mass of 11.86 mol of H₂S, we can use the formula:
mass = moles x molar mass
mass = 11.86 mol x 34.08 g/mol
mass = 404.5 g
Therefore, the mass of 11.86 mol of H₂S is 404.5 grams.
To know more about mass, refer to the link below:
https://brainly.com/question/14200145#
#SPJ11
in the following reaction, kc is much less than 1. at equilibrium, which of the following statements is true?select one:a.the concentration of reactant is much greater than the concentration of products.b.the concentration of products is much greater than the concentration of reactants.c.the concentrations of products and reactants are approximately equal.d.a catalyst will increase the concentration of products formed.e.at equilibrium, the concentrations of reactants and products are equal.
when kc is much less than 1, the equilibrium lies towards the side of reactants, and the concentration of reactants is much greater than the concentration of products at equilibrium. the concentration of reactants is much greater than the concentration of products. Hence, option (a) is the correct answer.
The value of kc is the equilibrium constant which is a measure of the extent to which a reaction will proceed towards the formation of products. When kc is much less than 1, it means that the numerator of the equilibrium constant expression, which represents the concentration of products, is much smaller than the denominator, which represents the concentration of reactants. This indicates that the reaction is not proceeding much towards the formation of products and is mostly staying in the form of reactants.
Therefore, at equilibrium, the concentration of reactants will be much higher than the concentration of products. The other options are incorrect as they do not explain the behavior of a reaction where kc is much less than 1. A catalyst will not change the position of equilibrium, and the concentrations of reactants and products will not be equal at equilibrium.
In conclusion, when kc is much less than 1, the equilibrium lies towards the side of reactants, and the concentration of reactants is much greater than the concentration of products at equilibrium.
for more such questions on equilibrium
https://brainly.com/question/19340344
#SPJ11
When the equilibrium constant Kc is much less than 1 in a reaction, it indicates that at equilibrium, the system is dominated by reactants rather than products. Therefore, the concentration of the reactants is much greater than the concentration of the products.
Explanation:In the given reaction, when the equilibrium constant (Kc) is much less than 1, it means the reaction system contains mostly reactants, not products, when equilibrium is reached. Therefore, option 'A' is correct: the concentration of reactant is much greater than the concentration of products.
The value of the equilibrium constant Kc provides us with a sense of the ratio of product concentrations to reactant concentrations at equilibrium. If Kc is less than one, this suggests that, at equilibrium, the concentration of the reactants is larger than the concentration of the products. Establishment of the equilibrium does not tell us about the speed of the process. Some equilibriums are reached quickly, and others happen slower and no observable change can be seen over a lengthy period.
Note that the equal concentrations of reactants and products are not mandatory for the equilibrium. The system reaches equilibrium when the rate of the forward reaction is equal to the rate of the backward reaction, and not necessarily when the concentrations of reactants and products are equal.
Learn more about Chemical Equilibrium here:https://brainly.com/question/32227445
#SPJ12
Why are perchlorate salts unusually hazardous?
- They are toxic and volatile.
- Some are shock-sensitive.
- They are strong bases.
- They are water-reactive.
Perchlorate salts are unusually hazardous primarily because they are toxic and volatile.
Perchlorate salts are unusually hazardous primarily because they are toxic and some are shock-sensitive. Their toxicity can pose a risk to human health and the environment, while their shock-sensitive nature can cause them to react violently upon impact, potentially leading to accidents or explosions. Perchlorate salts are unusually hazardous due to several reasons. Firstly, they are toxic and volatile, meaning they can easily vaporize and become airborne, increasing the risk of inhalation and absorption through the skin. Secondly, some perchlorate salts are shock-sensitive, meaning they can easily detonate or explode when subjected to impact or friction.
Additionally, perchlorate salts are strong bases, which can cause severe chemical burns and damage to tissues and organs upon contact. Finally, they are also water-reactive, which can cause them to release oxygen and hydrogen gas, leading to potential fire and explosion hazards. Overall, the unique combination of these characteristics makes perchlorate salts particularly hazardous and requires careful handling and disposal.
Learn more about Perchlorate salts here: brainly.com/question/8269990
#SPJ11
Which of the following statements is/are true? 1. For a strong acid-strong base titration, the pH at the equivalence point is equal to 7. Il For a weak acid-strong base titration, the pH at the equivalence point is greater than 7. III. Adding a common-ion to the solution will increase the solubility of the insoluble salt. I and II Ill only Il only I only II and III MacBook A
The given statements I (For a strong acid-strong base titration, the pH at the equivalence point is equal to 7) and II (For a weak acid-strong base titration, the pH at the equivalence point is greater than 7) are true, while statement III (dding a common-ion to the solution will increase the solubility of the insoluble salt) is false.
In a strong acid-strong base titration, statement I is true. When a strong acid reacts with a strong base, the products are a salt and water, leading to a neutral solution with a pH of 7 at the equivalence point. This occurs because the strong acid and strong base completely dissociate, and their respective ions combine to form water.
Statement II is also true. In a weak acid-strong base titration, the pH at the equivalence point is greater than 7. This is because a weak acid does not completely dissociate in water, leaving a significant amount of conjugate base in the solution when it reacts with the strong base. The conjugate base from the weak acid can accept a proton from water, resulting in an increase in hydroxide ions (OH-) and a pH above 7 at the equivalence point.
However, statement III is false. Adding a common-ion to a solution containing an insoluble salt will decrease the solubility of the salt, not increase it. This occurs due to the common-ion effect, which states that the presence of a common ion suppresses the ionization of a weak electrolyte, causing the equilibrium to shift towards the formation of the insoluble salt and leading to a decrease in solubility.
To know more about titration, refer to the link below:
https://brainly.com/question/31229711#
#SPJ11
An ore is a mineral from which a metal can be extracted:Profitablyby Meltingby ChemicalsScientifically
An ore is a mineral from which a metal can be extracted profitably. The profitability of an ore depends on various factors such as the concentration of the metal in the ore, the accessibility of the ore, the cost of extraction, and the demand for the metal in the market.
One of the most common methods of extracting metals from ores is by melting. This involves heating the ore to a high temperature, causing the metal to melt and separate from the other components of the ore. The molten metal is then collected and purified through various techniques.Chemicals can also be used to extract metals from ores, and this process is known as hydrometallurgy. This involves dissolving the metal from the ore in a solution and then recovering the metal from the solution through precipitation or other methods.Scientifically, the extraction of metals from ores is a complex process that involves understanding the physical and chemical properties of the ore and the metal. This requires knowledge of various fields such as geology, chemistry, and metallurgy. Scientists use various techniques such as X-ray diffraction, spectroscopy, and electron microscopy to study ores and develop new methods of extraction that are more efficient and environmentally sustainable.For more such question on ore
https://brainly.com/question/89259
#SPJ11
A known volume of a solution prepared by dissolving a known mass of zinc chloride to a final volume of 100.0 mL will be titrated. The volume of the titrant, EDTA, needed to complex free Zn2+ in the sample is used to calculate the #moles of Zn in the sample, and indirectly, the moles Cl present. Which of the following mathematical operations gives you the number of moles of zinc which were titrated? A.)mass = #moles EDTA used to titrate sample X (1 mole Zn / 1 mole EDTA) X molar mass of zinc B.)mass = mass of sample titrated - mass of zinc complexed C.)volume EDTA x [EDTA] (moles / L) x ( 1 mole Zn / 1 mole EDTA) D.)mass = mass zinc chloride x volume of sample titrated 100.0 mL
The number of moles of zinc that were titrated in a solution prepared by dissolving a known mass of zinc chloride. The correct mathematical operation among the given options is: C.) volume EDTA x [EDTA] (moles / L) x (1 mole Zn / 1 mole EDTA)
Here's a step-by-step explanation:
1. Measure the volume of EDTA needed to titrate the sample.
2. Multiply the volume of EDTA by its concentration, given in moles per liter (moles / L).
3. Since there is a 1:1 ratio between moles of Zn and moles of EDTA, you can multiply the obtained value by the stoichiometric ratio (1 mole Zn / 1 mole EDTA).
4. The resulting value represents the number of moles of zinc that were titrated in the solution.
To know more about the EDTA refer here :
https://brainly.com/question/26556460#
#SPJ11
How can a streak plate become contaminated?
A streak plate is a common microbiological technique used to isolate individual bacterial colonies. This method involves streaking a sample of bacteria onto a sterile plate using a sterile inoculating loop. The loop is sterilized between each streak to prevent cross-contamination of bacterial colonies.
However, a streak plate can become contaminated if proper sterilization techniques are not followed. If the inoculating loop is not properly sterilized between each streak, it can carry over bacteria from the previous streak onto the next streak, resulting in mixed colonies on the plate.Another common source of contamination is improper handling of the sterile plate. If the lid of the plate is not securely closed, airborne bacteria can settle onto the surface of the plate and contaminate the culture.In addition, contaminated equipment or reagents can also lead to a contaminated streak plate. For example, if the agar medium used in the plate preparation is not properly sterilized, it can introduce bacteria into the culture.To prevent contamination of a streak plate, it is important to follow proper aseptic techniques and sterilization procedures. This includes sterilizing all equipment and reagents, using proper handling techniques, and properly closing the plate lid. By following these guidelines, a streak plate can be a reliable and effective method for isolating individual bacterial colonies.
Learn more about microbiological here
https://brainly.com/question/13022613
#SPJ11
what comes to mind when you hear the word radioactive
Answer:the act of emitting radiation spontaneously
Explanation:
classify each solvent correctly. hexane hexane drop zone empty. acetone acetone drop zone empty. ethanol ethanol drop zone empty.
Hexane is a non-polar solvent, acetone is a polar solvent, and ethanol is a polar solvent that can also dissolve non-polar compounds. The properties of each solvent make it suitable for different applications in the laboratory and industry.
The three solvents mentioned are hexane, acetone, and ethanol. These are organic solvents commonly used in various chemical and biological experiments.Hexane is an aliphatic hydrocarbon solvent with six carbon atoms and no double bonds. It is non-polar and has a low boiling point, making it ideal for extraction and purification of non-polar compounds. Hexane is often used in the food industry to extract vegetable oils from seeds and nuts.Acetone is a polar, aprotic solvent with a high vapor pressure and a low boiling point. It is commonly used in the laboratory as a solvent for polar compounds such as sugars, proteins, and nucleic acids. Acetone is also used as a cleaning agent and in the production of various chemicals, including plastics and fibers.Ethanol is a polar solvent that is often used as a solvent for polar and non-polar compounds. It is commonly used as a disinfectant, antiseptic, and solvent in the pharmaceutical and cosmetic industries. Ethanol is also used as a fuel and as a solvent in the production of various chemicals, including perfumes and flavorings.In summary, hexane is a non-polar solvent, acetone is a polar solvent, and ethanol is a polar solvent that can also dissolve non-polar compounds. The properties of each solvent make it suitable for different applications in the laboratory and industry.For more such question on non-polar solvent
https://brainly.com/question/3184550
#SPJ11
What is the formula of magnesium sulfate? Hint: SO42-
The formula of magnesium sulfate is MgSO4. In this compound, magnesium (Mg) has a +2 charge, and sulfate (SO4) has a -2 charge. These ions combine in a 1:1 ratio to form a neutral compound, resulting in the chemical formula MgSO4.
The formula of magnesium sulfate is MgSO4. It is a white, crystalline substance that is commonly used in a variety of applications. Magnesium sulfate is made up of one magnesium ion and one sulfate ion, which is represented by the chemical formula SO42-. This compound is widely used as a fertilizer, as it contains essential nutrients that plants need to grow. It is also commonly used in medicine as a laxative and as a treatment for eclampsia in pregnant women. In addition, magnesium sulfate is used in the production of paper, textiles, and various other industrial products.
Magnesium sulfate is a widely used compound in various industries, such as agriculture, healthcare, and manufacturing.
Visit here to learn more about magnesium:
brainly.com/question/1533548
#SPJ11
PART OF WRITTEN EXAMINATION:
In a corrosion cell, electrons flow in the direction of:
A) anode to the cathode through the electroylte
B) anode to the cathode through the metallic path
C) cathode to the anode through the electrolyte
D) cathode to the anode through the metallic path
Corrosion cells are a condition on a metal surface in which a flow of electric current occurs between the metal surface and an electrolyte with which it is in contact sufficient to cause the metal to degrade.
In a corrosion cell, electrons flow from the anode to the cathode through the metallic path. Therefore, the correct answer to the question is
B) anode to the cathode through the metallic path.
In the corrosion cell, metal ions formed from metal oxidation (cations) migrate from the anode to the cathode through the electrolyte. The electrons given off by this oxidation reaction move from the anode to the cathode through the electrical connection.
to know more about Corrosion cells click this link-
brainly.com/question/30800443
#SPJ11
