Cd2+(aq) + 2e- ---> Cd(s) , E° = -0.40 V Fe2+(aq) + 2e- ----> Fe(s) , E° = -0.44 V Since standard reduction potential.
Galvanic Cell: A chemical cell, also known as an electrochemical cell, is a device that transforms the chemical energy generated during a red-ox reaction into electrical energy. In honor of Luigi Galvanic and Alessandro Volta, who conducted the first experiments on the conversion of chemical energy into electrical energy, these are also known as galvanic or voltaic cells.
A spontaneous red-ox reaction occurs in an electrochemical cell in an indirect manner, and the reduction in free energy that occurs during the chemical reaction manifests as electrical energy. In an indirect red-ox reaction, the reduction and oxidation processes take place in two different containers known as half-cells.
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The cell potential is 0.01934 V at 25°C.
What is a galvanic cell?A galvanic cell, also known as a voltaic cell, is an electrochemical cell that converts the chemical energy generated by spontaneous redox reactions into electrical energy.
The main components of a galvanic cell are
Anode – Oxidation occurs at the anode
Cathode – Reduction occurs at the cathode
Salt bridge – consists of electrolytes that are needed to complete the circuit in a galvanic cell.
Half-cells – It is important as reduction and oxidation reactions are separated into compartments.
External circuit – it helps in Conducting the flow of electrons between electrodes
At cathode,
[tex]Cd^{2+}(aq) + 2e^-\rightarrow Cd(s)[/tex]
At anode,
[tex]Fe(s)+2e^-\rightarrow Fe^{2+}(aq)[/tex]
Overall cell reaction
[tex]Fe(s)+Cd^{2+}(aq)\rightarrow Fe^{2+}(aq) + Cd(s)[/tex]
[tex]E^o_{cell} = E^o_{cathode} - E^o_{anode}[/tex]
= -0.40 -(0.44) = 0.04 V
Nernst equation is given by
[tex]E_{cell} = E^o_{cell} - \frac{2.303RT}{nF} logQ[/tex]
At 25°C
[tex]E_{cell} = E^o_{cell} - \frac{0.0592V}{n} logQ[/tex]
Here, n = 2 and log Q = log [tex]\frac{0.250}{0.050}[/tex] = 0.699
[tex]E_{cell}[/tex] = 0.01934 V
The cell potential is 0.01934 V at 25°C
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In a particular redox reaction, no−2no2− is oxidized to no−3no3− and fe3 fe3 is reduced to fe2 fe2. complete and balance the equation for this reaction in acidic solution. phases are optional
Balanced chemical equation is - 3Fe2+ + NO3- + 4H+ → 3Fe3+ + NO + 2H2O
Fe2+ + NO3- + H+ → Fe3+ + NO3- + NO + H2O
Fe+22+ + N+5O-23- + H+1+ → Fe+33+ + N+5O-23- + N+2O-2 + H+12O
3Fe2+ + NO3- + 4H+ → 3Fe3+ + NO + 2H2O
A balanced chemical equation specifies the quantities of reactants and products required to meet the Law of Conservation of Mass. This signifies that there is the same number of each sort of atom on the left side of the equation as there are on the right side. The rule of a balanced chemical equation is used to determine if two weights put on opposing sides of the fulcrum will balance each other.
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In a titration experiment, 31. 4 ml of 1. 120 m hcooh is neutralized by 16. 3 ml of ba(oh)2. what is the concentration of the ba(oh)2 solution?
In a titration experiment, 31. 4 ml of 1. 120 M HCOOH is neutralized by 16. 3 ml of [tex]Ba(OH)_{2}[/tex]. So, the concentration of the [tex]Ba(OH)_{2}[/tex] solution is 23.16 M
Calculation,
The formula for the dilution of a solution is given as:
[tex]M_{1} V_{1}[/tex] = [tex]M_{2} V_{2}[/tex]
Where M is molarity and V is the volume of the solution in liters ( L ).
Given data,
[tex]M_{1}[/tex] = 120 M
[tex]V_{1}[/tex] =31. 4 ml
[tex]M_{2}[/tex] = ?
[tex]V_{2}[/tex] = 16. 3 ml
120 M ×31. 4 ml = [tex]M_{2}[/tex] × 16. 3 ml
[tex]M_{2}[/tex] = 120 M ×31. 4 ml / 16. 3 ml =23.16 M
In a titration experiment, the concentration of the [tex]Ba(OH)_{2}[/tex] solution is 23.16 M
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URGENT 80 POINTS AND BRAINLIEST FOR ANSWER
this wuestion or photo is on my chemistry DBA laster today, what is it? please explain possible questions and responses and answers to what may be asked.
i think it involves things like the reaction moving forward and what would do that or somehing but i am unsure. something online said stuff that raise pressure was the answer to something but why?
sorry if this is confusing i havent been given an actual question for this yet but need to know ahead of time.
The isotope 131i (iodine-131), which has a half-life of 8. 02 days, is used in nuclear medical imaging. what percentage of the original activity in the sample remains after 17. 5 days?
The percentage of the original sample which would remain after 17.5 days according to the given half-life of the isotope is; 22.06%.
What percentage of the original activity in the sample remains after 17.5 days?The given sample in discuss has a half life of; 8.02 days, this therefore indicates that after 17.5 days, the number of half-life periods completed is; 17.5/8.02 = 2.18 half-lifes.
Hence, the percentage of the original sample remaining after 17.5 days can be evaluated as follows;
N = 100% × (0.5)^2.18
N = 100 × 0.22
N = 22.06%.
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A label on an empty sample container reads 12. 00 g. you add in a sample of a compound and mass the sample container obtaining 15. 5465 g. what should the mass of the sample be reported as?
The mass of the substance is the quantitative measure of the physical object. The mass of the sample must be reported as 3.5465 g. Thus, option e is correct.
What is mass?The mass of the substance is the quantity of matter that the sample weighs and is reflected in grams or kilograms.
Given,
Mass of empty sample container = 12.00 g
Mass of sample + empty container = 15.5465 g
The mass of the sample will be given as,
mass of sample = (Mass of sample + empty container) - ( Mass of empty container)
= (15.5465 g - 12.00g)
=3.5465 g
Therefore, 3.5465 gm is the mass of the sample, and the correct option is e.
Your question is incomplete, but most probably your full question was, A label on an empty sample container reads 12.00 g. you add in a sample of a compound and the mass of the sample container obtaining 15.5465 g. what should the mass of the sample be reported as?
3.546 g3.54 g4 g4.0 g3.5465 gLearn more about mass here:
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What is the molar solubility of a saturated solution of magnesium hydroxide, mg(oh)2, in water? the ksp of mg(oh)2 is 1. 2×10^–11
The molar solubility of saturated solution of magnesium hydroxide in water will be 1.4 × [tex]10^{-4}[/tex].
The concentration of such ions in a suitable solvent that will be in equilibrium with both the solid substance is known as the solubility product, or Ksp, of such an ionic compound.
When a chemical substance in the solid form would be in chemical equilibrium with such a solution of that molecule, a solubility equilibrium would be a sort of dynamic equilibrium that develops.
The molar solubility of magnesium hydroxide can be expressed as:
[tex]K_{sp} = [Mg^{2+} ][OH^{-} ]^{2}[/tex]
Let the molal solubility will be S.
[tex]K_{sp} = S(S^{2} )\\1.2 * 10^{-11} = 4S^{3} \\(S)^{3} = 0.3 *10^{-11} \\S = 1.4 *10^{-4}[/tex]
Therefore, the molar solubility of saturated solution of magnesium hydroxide in water will be 1.4 × [tex]10^{-4}[/tex].
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Draw the mechanism for the acid-catalyzed reaction of acetic acid (ethanoic acid) with the methanol to yield methyl acetate (methyl ethanoate)
When ethanoic acid react with methanol in the presence of H⁺ or heat it gives methyl ethanoate and water.
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now write the chemical equation
CH₃COOH + CH₃OH ⇄ CH₃COOCH₃ + H₂O
Here
CH₃COOH is Ethanoic acid (Acetic acid)
CH₃OH is Methanol (Methyl Alcohol)
CH₃COOCH₃ is Methyl ethanoate (Methyl Acetate)
H₂O is water
Thus from the above conclusion we can say that When ethanoic acid react with methanol in the presence of H⁺ or heat it gives methyl ethanoate and water.
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How many grams are in 0. 743 mol of al?
There are 20.046 grams in 0.743 moles of Al.
Mole is the SI unit of measurement of the matter present inside any substance or element. It is denoted by the 'n'.
The formula of finding mole is
n = mass / molar mass
According to the question, to find the mass of Al the formula can be rewritten as mass = moles × molar mass.
Molar mass of Al = 26.98 g/mol.
Moles of Al = 0.743 moles
Therefore, mass of Al = 0.743 moles × 26.98 g/moles
Hence, mass = 20.046 grams
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15. conjugated dienes routinely undergo 1,2 and 1,4 addition reactions with a variety of electrophilic reagents; this suggests that ___ are likely intermediates during these reactions
Conjugated dienes routinely undergo 1,2 and 1,4 addition reactions with a variety of electrophilic reagents; this suggests that electrophilic reagents are likely intermediates during these reactions.
Two double bonds and one single bond divide a conjugated diene into two halves. Nonconjugated (Isolated) Dienes have more than one single bond separating two double bonds. Two double bonds are joined to the same atom to form cumulated dienes.
Reagents that function by acquiring electrons or sharing electrons that once belonged to a foreign molecule are referred to as electrophilic reagents, or electrophiles, in some cases. Electrophiles are molecules with a positive charge and a lack of electrons that can react by exchanging electron pairs with nucleophiles, which have many electrons. Epoxides, hydroxy amines, nitroso and azoxy derivatives, nitrenium ions, and elemental sulfur are significant electrophiles.
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How many neutrons are needed to initiate the fission reaction? u92235 ?10n⟶te52137 zr4097 210n
Neutrons are required. Atomic Radiation, Nuclear Graphite, and Effects
The fission reaction is often started by an impinging neutron, and each fission produces an average of 2.5 neutrons.
With the exception of the hydrogen nucleus, which has a single proton, neutrons are necessary for the stability of nuclei. Nuclear fission and fusion generate a tonne of neutrons.
Scattering tests and research on nuclear binding energies provide evidence for the nuclear forces' finite range. The neutron-proton (n-p) potential energy map in Figure 44.3a, which was created by scattering neutrons from a target containing hydrogen, illustrates the short range of the nuclear force. The n-p potential energy well is 40 to 50 MeV deep, and the nucleons are prevented from getting much closer than 0.4 fm by a strong repulsive component.
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We need to add one neutron to initiate the fission reaction.
What are nuclear reactions?The reaction in which the identity or characteristics of an atomic nucleus change due to the bombarding of it with an energetic particle is known as a nuclear reaction.
The bombarding particle can be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy ion.
What is nuclear fission?In nuclear fission, an atom splits into lighter nuclei due to the bombarding of an energetic particle.
The reaction given is
[tex]_{92}^{235}U + .... _{0}^{1}n \rightarrow _{52}^{137}Te + _{40}^{97}Zr +_{0}^{1}n[/tex]
To find the number of neutrons we have to balance the reaction
Atomic mass on reactant side = 235 + 1 = 236
The atomic number on the reactant side = 92
Atomic mass on the products side = 137+97+2 = 236
The atomic number on the products side = 92
As the reaction is already balanced
We need to add one neutron to initiate the fission reaction.
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Identify oxidation.
a. Increase in oxidation number.
b. Loss of electrons.
c. Decrease in oxidation number.
d. Gain of electrons.
e. Both A and B
Oxidation is "Increase in oxidation number" as well as loss of electrons.
A rise in oxidation number results from the loss of negative electrons, whereas a reduction in oxidation number results from the gain of electrons. As a consequence, the oxidized element or ion experiences a rise in oxidation number.
As a result of losing electrons in the process, a reactant oxidizes. When a reactant obtains electrons during a reaction, reduction takes place. This frequently happens when acid and metals react.
Therefore, Oxidation is "Increase in oxidation number" as well as loss of electrons.
Hence, the correct answer will be option (e)
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4fe 3o2 xh2o → 2fe2o3 • xh2o the formation of rust (equation above) is an example of both combustion and
The formation of rust (equation above) is an example of both combustion and Synthesis
What is a synthesis reaction?A synthesis reaction is a classification of responses in which multiple reactants connect to form a single product. If we observe the equation, no replacement is accepted place hence, single and double replacements are wrong choices.In decomposition reaction there is only one reactance which gets disintegrate and form multiple product.Synthesis reactions are reactions that occur when two additional atoms or molecules interact to form a separate molecule or compound. Most of the time, when a synthesis reaction occurs, energy is discharged and the reaction is exothermic. However, an endothermic consequence is also feasible.learn more about synthesis reaction, refert o:
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Answer:
synthesis
Explanation:
An analytical chemist has determined by measurements that there are 8. 5 moles of magnesium in a sample of talc. how many moles of hydrogen are in the sample?
The moles of hydrogen in the talc sample are 5.67 moles.
Talc are the hydrous silicate minerals. The chemical formula of talc is Mg₃Si₄O₁₀(OH)₂.
From the formula it can be determined that there are: 3 moles of Mg, 4 moles of Si, 12 moles of O and 2 moles of H.
Moles are a type of SI unit of measurement of the amount of substance.
According to the question, magnesium = 8.5 moles
Also, 3 moles of Mg = 2 moles of H
Therefore, moles of H = 8.5 moles × (2 moles H / 3 moles Mg)
moles of H = 5.67 moles
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Gallium exists naturally as a mixture of two isotopes, Gallium - 69 & Gallium - 71. The atomic mass number of gallium is 31.
Relative Atomic Mass of Gallium is 69.8 . Calculate % composition of each isotope
Considering the definition of atomic mass, isotopes and atomic mass of an element, the % composition of each isotope is:
Gallium - 69: 60% Gallium - 71: 40%Definition of atomic massFirst of all, the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.
Definition of isotopeThe same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.
Definition of atomic massOn the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes. In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.
% composition of each isotopeIn this case, the first isotope Gallium - 69 has an atomic mass of 69 and a percent natural abundance of X%. The second isotope Gallium - 71 has an atomic mass of 71 and a percent natural abundance of (100-X)%.
On the other hand, the Relative Atomic Mass of Gallium is 69.8 .
Then, the value of X can be calculated as:
69× X+ 71× (1-X)= 69.8
Solving
69× X+ 71× 1- 71× X= 69.8
69× X+ 71- 71× X= 69.8
69× X- 71× X= 69.8 - 71
- 2× X= -1.2
X= (-1.2)÷ (-2)
X=0.6 which expressed as a percentage is X%= 60%.
So, the % compositon of Gallium - 71 is calculated as (100-X)%=(100 -60)%= 40%
Finally, the % composition of each isotope is:
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[?] describes how small molecules can be selectively removed from a colloidal suspension while retaining large molecules.
A) Dialysis
B) The Tyndall effect
Answer:
using a centrifuge
Explanation:
Centrifugation will make the large molecules to settle at the bottom.
The Most suitable answer is tyndall effect
In a kitchen, during preparation of food or tea, salt and sugar are
mixed. What methods for separation of this mixture would you
suggest to your mother?
Answer:
A mixture of salt and sugar can be separated by the process of filtration.
How does the mass per nucleon of an element change as the atomic number increases?
Answer:
Explanation: So, the atomic number is the number of protons present in an atom. For example, Helium's atomic number is 2, meaning it only has 2 protons. In most cases, the number of nuetrons and protons are equal, so Helium (usually) has 2 protons and 2 nuetrons - this is the nucleus. The atomic mass, or mass per nucleon is the proton and nuetron added together, so the atomic mass of Helium is about 4. Therefore, on the periodic table, as the atomic number increases by 1, the atomic mass increases by about 2 (the atomic mass is an average so it's not exact).
A solution is 0. 0480 m lif. What is the molarity of the solution if the density is 1. 10 g/ml?.
Molarity of the solution is 0.0527 M.
What is Molarity?The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
Calculation of Molarity of the solutionAssume there is 1 kg of solvent present in the beginning.
Thus, the mole of solute is 0.0480 moles of LiF.
Molar mass of LiF = 25.939 grams/mole
0.0480 mol LiF x 25.939 g/1 mol LiF = 1.245 g LiF
Mass of the solution = 1001.245 g
The molarity of the solution can be determined as illustrated using the supplied density and moles of solute.
[LiF] = mol LiF/ volume of solution
[LiF] = 0.0480 mol/1001.245 g x 1ml/1.10g x 1L/1000mL
Hence, the molarity of LiF = 0.0527 M
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When a known quantity of compound, at a known concentration, is added to a known volume of another compound to determine the concentration of the latter, the process is referred to as?
A titration is a method for figuring out the concentration of an unknown solution by using a solution with known concentration.
What is Titration?
Titration, commonly referred to as titrimetry, is a quantitative analysis technique that enables chemists to estimate the quantities of specific chemicals in a sample that are unknown.
A known volume of one solution of known concentration (referred to as a titrant) is slowly added to a known volume of another solution of unknown concentration (referred to as analyte) throughout the basic titration procedure until the reaction reaches neutralization.
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You use a microwave to heat a mug of water. The mug has 235 grams of water (with specific heat 4.186 Joules per gram per degree Celsius). The microwave adds 66,000 Joules of energy to the water. How much does this raise the temperature of the water
Answer:
67° C increase
Explanation:
235 gm * 4.186 J /g-C * x = 66 000 J x = degree change C°
x = 67 degrees C
Predict the mass (in grams) of precipitate that will form if a solution containing 2.34 g of cesium hydroxide is added to a solution containing a large excess of tiso4?
The mass of precipitate formed if a solution containing 2.34 g of cesium hydroxide is added to a solution containing a large excess of tiso4 is 0.6387 g
Mass of CsOH = 2.34 g
Number of moles of CsOH = 149.9 g / mol
Molar mass of CsOH = Mass of CsOH / Number of moles of CsOH
= 2.34 / 149.9
Molar mass of CsOH is 0.0156 mol
Chemical reaction2 CsOH + TiSO4 → Ti(OH)2 + CsSO4
In this reaction 2 moles of CsOH gives 1 mole of Ti(OH)2
0.0156 mol of CsOH will produce, 0.0156 / 2 = 0.0078 mol
0.0156 mol of CsOH will produce 0.0078 mol of Ti(OH)2
Mass of Ti(OH)2 = Molar mass of Ti(OH)2 / Number of moles of Ti(OH)2
= 0.0078 * 81.88
= 0.6387 g
Mass of Ti(OH)2 formed is 0.6387 g
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The mass of precipitate formed is 0.90441 g
cesium hydroxide is added to a solution containing a large excess of TiSo4
The chemical reaction is
2CsOH + TiSo4 → Ti(OH)2 + CsSo4
The above reaction the Ti(OH)2 is a precipitate formed
Molar mass = mass of a substance / mass of one mole
Mass of CsOH = 2.34 / 149.912
Mass of CsOH = 0.0156 mol
The above reaction 2 mol of cesium hydroxide yield 1 mol of titanium hydroxide
Then, 0.0156 mol of CsOH yield 0.0156 / 2 = 0.0078 mol of Ti(OH)2
The mass of Ti(OH)2 is 115.95
0.0078 mol of Ti(OH)2 = 115.95 X 0.0078
= 0.90441
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The average person will absorb no more than how many mg of calcium at one time?
a. 1500
b. 500
c. 200
d. 1000
The average person will absorb no more than 500 mg of calcium at one time.
So, option B is correct one.
For maximum absorption, no more than 500 mg of calcium should be taken in a single dose. The absorption of the minerals is actually lower by taking too high an amount of calcium at one time from a supplement. Calcium is absorb from the food. If you think you need more a calcium supplement , ask your doctor or dietitian to recommend one. Taking too high amount of calcium at one time, particularly from a supplement , can actually lower the absorption of the mineral.
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How many milliliters of 0. 0140 m na2s2o3 solution are needed to dissolve 0. 590 g of agbr? agbr(s) 2na2s2o3(aq)→na3ag(s2o3)2(aq) nabr(aq)
The molarity of the solution can be used to give the moles and the volume of the solution. The 0.0140 M sodium thiosulfate needs 225 ml of volume.
What is molarity?Molarity is the property of the solution that is given by the ratio of the moles of the solute to the volume of the solution in liters.
Given,
Molarity of Sodium thiosulfate = 0.0140 M
Mass of solute (AgBr) = 0.590 gm
Molar mass of AgBr = 187.77 g/mol
First moles from the mass can be calculated as,
Moles = mass ÷ molar mass
n = 0.590 g ÷ 187.77 g/mol
= 0.00314 moles
Now, the volume of the solution from molarity is calculated as,
Volume = moles ÷ molarity
= 0.00314 moles ÷ 0.0140
= 0.225 L
Therefore, 225 mL is the volume required.
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A volume of oxygen gas occupies 38. 7 ml at 751 mmhg and 21°c. what is the volume if the pressure changes to 359 mmhg while the temperature remains constant?
Answer:
80.96 L
Explanation:
START WITH
P1 V1 = P2 V2
V2 = P1 V1 / P2
= 751 * 38.7 / 359 = 80.96 L
According to Boyle's law, where the temperature remains constant the volume of the gas if the pressure changes to 359 mm Hg is 80.95 ml.
What is Boyle's law?Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,
P₁V₁=P₂V₂
Substitution in the above equation gives ,V₂=751×38.7/359=80.95 ml.
Thus, the volume of gas at 359 mm Hg pressure is 80.95 ml.
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A solution of acetic acid, hc2h3o2, on a laboratory shelfwas of undetermined concentration. if the ph of the solution wasfound to be 2. 68, what was the concentration of the acetic acid?
A solution of acetic acid , on a laboratory shelf was of undetermined concentration. if the pH of the solution was found to be 2. 68 , then its the concentration of the acetic acid was 2×[tex]10^{-3}[/tex]
Calculation ,
A figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline.
We have to find concentration of the acetic acid .
pH = 2. 68
pH = -㏒[ [tex]H^{+}[/tex] ]
2. 68 = -㏒[ [tex]H^{+}[/tex] ]
[ [tex]H^{+}[/tex] ] = [tex]10^{-2.68}[/tex]
[ [tex]H^{+}[/tex] ] = 2×[tex]10^{-3}[/tex]
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The chemical breakdown of starch that occurs in the mouth is due to the enzyme action of:_______.
Because of the enzyme action of Amylase, the chemical breakdown of starch happens in the mouth.
It is an enzyme, simply a type of protein that aids in breaking down the carbohydrates in your body. The main two glands as the pancreas and salivary glands help in making amylase in your mouth.
A small amount of amylase is also present in your urine and blood. If the levels present in your body are high then it causes health problems.
The amylase test performs to know the amount of amylase present in your body. This test is called as "amy test".
The normal range of Amylase in the human body is 40 to 140 U/L or 0.38 to 1.42 microkat/L.
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Which reaction is an oxidation reaction?
a. 1-octene → octane
b. octane → 1-octene
c. 1-octanal → 1-octanol
d. 1,3-octadiene → 1-octene
e. 1-chlorooctane → 1-octanol
1-octanal → 1-octanol is an oxidation reaction.
Oxidation
The removal of hydrogen or any other electropositive element, or the addition of oxygen, is said to be the process of oxidation in classical or earlier concepts. The process of an atom or ion losing one or more electrons is known as oxidation, according to the electronic notion.
An oxidizing agent is something that causes oxidation. O2, S, Cl2, Br2, and H2O2 are oxidizing agents in the instances above. Oxidation has an easy source. When an atom, molecule, or even an ion comes into contact with oxygen, oxidation results. When this occurs, it changes to achieve a more stable structure in its electron shells and transfers electrons as a result.
Any chemical process, including oxidation, is primarily brought on by atoms attempting to obtain valence shells with a complete complement of electrons. The stability of the species is increased by this optimum configuration.
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The compound
is classified as a
The compound is classified as a secondary amine
Two organic substituents (alkyl, aryl, or both) are bonded to the nitrogen together with one hydrogen in secondary amines. Dimethylamine is a significant representation, while diphenylamine is an example of an aromatic amine. Secondary amines are amines that have two alkyl or aryl groups in place of the two hydrogen atoms of ammonia.
The molecule is methylpropylamine, a secondary amine because the nitrogen atom has both a methyl group and a propyl group. Compared to primary amines, secondary amines are more basic. The NH2 group is joined to the electron-withdrawing C6H5 group in aromatic amines. As a result, there are fewer single electron pairs available on N. Alkyl amines are hence more basic than aromatic amines.
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Enter your answer in the provided box. calculate the ph of a 0. 39 m ch3cooli solution. (ka for acetic acid = 1. 8 × 10−5. )
The pH of the solution is the negative logarithm of a proton or the hydrogen ion concentration. The pH of 0.39 M acetic acid solution (CH₃COONa) is 2.58.
What is pH?The pH has been said to be the hydrogen ion concentration that can also be given by the pOH.
Given,
The acid dissociation constant Ka = 1.8 × 10⁻⁵
Concentration of acetic acid (C) = 0.39 M
The hydrogen ion concentration from Ka and molar concentration are calculated as:
H⁺ = √ Ka × C
= √1.8 × 10⁻⁵ × 0.39
= √0.00000702
= 0.0026
Now, pH from hydrogen ion is calculated as,
pH = - log [H⁺]
= - log [0.0026]
= 2.58
Therefore, the pH of acetic acid is 2.58.
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The surfaces of the cylinder block and cylinder head are _______ to help cool the engine.
The surfaces of the cylinder block and cylinder head are interconnected to help cool the engine.
When an automobile engine is running, it generates a lot of heat and needs to be continuously cooled to prevent engine damage.
This is typically accomplished by pumping coolant liquid—often water combined with antifreeze solution—through unique cooling tubes. Air passing across cylinder casings with fins helps cool some engines.
The cylinder head and block of a water-cooled engine are interconnected by coolant channels. All of the channels come together to form a single exit at the top of the cylinder head.
Hot coolant is forced out of the engine and into the radiator, which serves as a type of heat exchanger, by a pump that is driven by a pulley and belt from the crankshaft.
Unwanted heat is transferred from the radiator into the air stream, after which the cooled liquid flows back into the channels after returning to an entrance at the bottom of the block.
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