what type of quantitative chemical method was used to determine the precise concentration of hydroxide in the experiment?

The concentration of the H2SO4 solution should be 0.1101 M.

Calculation of the concentration:

Since

Volume of H2SO4 = 30.00 mL = 0.030 L

Volume of NaOH= 44.45 mL = 0.04445 L

Concentration of NaOH= 0.1489 M

Now

The balanced equation is

H2SO4 + 2NaOH → Na2SO4 + 2H2O

Now the concentration of the H2SO4 solution is

b*Ca*Va = a*Cb*Vb

here,  b = the coefficient of NaOH = 2

Ca = ?

Va = the volume of H2SO4= 30.0 mL = 0.030 L

a = the coefficient of H2SO4 = 1

Cb = the concentration of NaOH = 0.1489 M

Vb = the volume of NaOH = 44.45 mL = 0.04445 L

Now

2*Ca*0.030 = 1* 0.1489* 0.04445

0.060 * Ca = 0.00661

Ca = 0.1101 M

Hence, The concentration of the H2SO4 solution is 0.1101 M.

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The solute potential at 26 degrees Celsius of the molar concentration of a sugar solution in an open beaker has been determined to be 0.5m is -12.4 bar.

Solute potential can be calculated by using:

Ψ = -iCRT

As we know,

i = 1

C = 0.5 (mol/L).,

R = 0.0831 L·bars/mol·K

T = 299K

Ψ = - 0.5*0.0831*299 = - 12.4 bar

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The ability of sim agar to test for hydrogen sulfide production is based on the addition of which of the following substrates - Peptones, Sodium Thiosulphate, Ferrous Sulfate.

An example of a multi-test medium is SIM (sulfide, indole, motility) media, which examines multiple aspects of the bacterium's metabolism simultaneously. In this instance, motility, indole synthesis, and hydrogen sulfide generation.

Motility, indole, and sulfur. This media is differential. It examines an organism's capacity to reduce sulfur, make indole, and move through the agar (be motile). SIM is frequently used to distinguish between Enterobacteriaceae species.

Pancreatic digest of casein, peptic digest of animal tissue, ferrous ammonium sulfate Fe(NH4)2(SO4), sodium thiosulfate Na2S2O3, agar (3.5 g/L), and distilled water are all ingredients in SIM Medium.

The colorless gas hydrogen sulfide (H2S) has a pungent smell of rotting eggs. The eyes and respiratory system may get irritated after being exposed to hydrogen sulfide.

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The three samples of an ideal gas, all at the same temperature, occupy identical containers with the same volume. the particle mass is proportional to the  size of particles.  the gas samples has the greatest pressure is in which has greater no. of moles.

The equation for an  ideal gas given as :

P V = n RT

where,

P = pressure

V = volumes in L

T = temperature at K

n = moles

R = 0.082 L atm / mol K = gas constant

since volume and temperature are constant , then :

P = n

therefore greater the number of moles , greater will be the pressure.

Thus, The three samples of an ideal gas, all at the same temperature, occupy identical containers with the same volume. the mass of the particle is proportional to its size.  the gas samples has the greatest pressure is in which has greater no. of moles.

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Enantioselective are reactions that generate products that are enriched in one enantiomer.

Enantiomers are pairs of molecules that exist in two forms that are mirror images of each other but are not superimposable. The enantiomers are chemically identical in all other respects. Enantiomeric pairs are distinguished by the direction in which they rotate polarized light when dissolved in solution, either dextrorotatory (d or +) or levorotatory (l or -). Hence the term optical isomer.

The enantioselectivity of a chromatography system is defined as the preferential interaction of one enantiomer with a chiral selector. It is usually determined as the ratio of the retention factors of the two enantiomers in a chiral chromatography or electrophoresis system.

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The hydronium-ion concentration of the solution containing 0.0085 M Ba(OH)₂ is 0.017M and the hydroxide-ion concentration of the solution containing 0.0085 M Ba(OH)₂ is 5.88 × 10⁻¹³ M.

Given,

Ba(OH)₂ = 5.88 × 10⁻¹³ M

Dissociation of Ba(OH)₂ is given as :

Ba(OH)₂ → Ba²⁺ + OH⁻

Balanced equation:

Ba(OH)₂ → Ba²⁺ + 2OH⁻

As 1 mole of barium hydroxide produces 2 moles of hydroxide ions, so the concentration of hydroxide ion is,

[OH⁻] = 2 × [Ba(OH)₂]

[OH⁻] = 2 × 0.0085 M

[OH⁻] = 0.017 M

The concentration of hydronium ion is as follows:

[H₃O⁺] = Kw / [OH⁻]

∴ Kw = 1.0 × 10⁻¹⁴

[H₃O⁺] = 1.0 × 10⁻¹⁴ / 0.017

⇒ [H₃O⁺] = 5.88 × 10 ⁻¹³

Hence, the hydronium-ion and the hydroxide-ion concentration of the solution containing 0.0085 M Ba(OH)₂ at 25°C are 5.88 × 10 ⁻¹³ and 0.017 M respectively.

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The pH of 10 g dm -3 HCL​ is 3. The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality.

Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

Hydrogen potentials are what PH stands for. It speaks of how many hydrogen ions are present in a solution. This serves as a gauge for the acidity or alkalinity of a solution. On a pH scale, the pH value ranges from 0 to 14.

A solution's pH is a significant indicator of its chemical composition. The pH may affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.

[ H⁺ ] = 10 − 3 M,

pH = − log [ 10 − 3 ],

pH = 3.

Thus, The pH of 10 g dm -3 HCL​ is 3.

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564.930995917 ml of potassium hydroxide would have to be added .

What is pH ?

The pH of a food is a direct function of the free hydrogen ions present in that food. Acids in food release free hydrogen ions. Hydrogen ions give acidic foods their characteristic sour taste. Therefore, pH can be defined as a measure of free acid. More specifically, pH is defined as the negative logarithm of hydrogen ion concentration. The pH range is 0 to 14. The pH of pure water is exactly 7, so pH 7 is neutral. Values ​​less than 7 are acidic. Values ​​above 7 are basic or basic.

Foods are generally classified as “acidic foods” (low pH, pH 4.6 or less) or “weakly acidic foods” (high pH, ​​pH 4.6 or higher). Safe food storage is determined by the pH of the food. Acidic foods such as fruit and pickles can be safely canned in a tin can with a hot water bath. A combination of acid and hot water (212°F) destroys perishable organisms such as mold and yeast. Proper cooking water canning processes are important to prevent the growth of acid-tolerant molds and yeasts that can lead to elevated pH levels. The pH of borderline foods such as figs and tomatoes can easily exceed 4.6, so lemon juice or citric acid should be added before canning with boiling water. Low-acid foods such as vegetables and meat should be processed in a pressure preserver for safety.

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if 100. ml of the solution in part 1 is concentrated by evaporation to give a final volume of 1.00 ml, the change in pH decreases by 2 pH increases by 2.

what is evaporation?

However, This procedure is therefore stated to include a shift in the liquids' condition of matter.

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The plates which borders the great philippine plate are the:

It follows that all the plates which have the sea Philippines plates bordered have one thing in common. They are all defined by means of convergent boundaries. In order words, the Pacific, Sunda and Eurasia plates border the philippine plate are produced by different plates which are converging towards each other in several directions.

In conclusion, we can now know that one of the major plates which borders the sea philippines plate is the Pacific plates.

Complete question:

Which plates borders the philippine plate?

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Sodium can combine with element "X" so that the chemical formula is Na₂X. element "X" be Sulphur and compound is Na₂S - sodium sulfide.

Ionic bond involves the attraction in positive charge , cation and negative charged anion . The charge of amount of atoms balance to become a neutral compound. Sodium is a metal and have tendency to donate electron and become Na⁺ and Sulphur is a non metal and have tendency to accept electron and form S²⁻. The both combine and for a ionic compound. the 2 negative charge of sulfur atom may be neutralize by 2 Na⁺ atom.

2Na⁺   +   S²⁻   ------>    Na₂S

Thus, Sodium can combine with element "X" so that the chemical formula is Na₂X. element "X" be Sulphur and compound is Na₂S - sodium sulfide.

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Answer is Δs=0.3kJ/K

Since, the tank is insulated rigid tank, The process is constant volume process,

Air as perfect gas

Obtain the properties from the table. Consider th state 1. P=100kPa, T, = 15°C

s=6.830kJ/kg-K

v=0.827 m³/kg

Constant volume process,

Consider the state 2. T = 40°C, v, v = 0.827 m²/kg

5,6.890 kJ/kg-K

Calculate the change in entropy,

Δs=m(s, -s) =5(6.890-6.830)

Δs=0.3kJ/K

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The Correct answer is A) small, simple hydrocarbon molecules the following best summarizes the composition of hydrocarbon molecules in this outcrop of tar sand.

Crude oil, natural gas, and coal all contain hydrocarbons, which are organic molecules made of hydrogen and carbon. Humans have modified them to be utilized as an energy source, such as in the production of gasoline and jet fuel.

The simplest organic molecules, hydrocarbons are composed exclusively of hydrogen and carbon atoms.

Fuel is the most significant application of hydrocarbons. Among the most widely used hydrocarbon fuels include gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane. Plastics and synthetic fabrics like polyester are made using hydrocarbons as well.

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There are 14 valence electrons assigned to the n atom.as it forms  NH4CL lewis structure.

Lewis structure can be explained the bonding pair from the lone pair electrons.it shows non bonding electrons.hydrogen atom form one covalent bond.cl is anionic monoatomic ligand. H is a diatomic anionic ligand. Nitrogen is the least electronegative atom goes at the center.Hydrogen atoms always go on the outside of lewis structure.

In this, N has 5 valence electron.Hydrogen has 1 and cl has 7 valence electron.that gives total 14 valence electrons.cl has 3 lone pairs and n has a lone pair..

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The alternative method to collect the gas and measure the volume is by a gas syringe.

What is a gas syringe?

Gas syringe is an equipment used to pump or withdraw gas from a closed container and can measure the volume of the gas produced in any chemical reaction.

The volume of the gas produced can be measured by reading the measuring scale on the gas syringe when the plunger moves in a gas syringe.

Hence, gas syringe is an alternative method to collect and measure the volume of the gas in a chemical reaction.

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Answer:

Explanation:

Ionic bonds form between two or more atoms by the transfer of one or more electrons between atoms. Electron transfer produces negative ions called anions and positive ions called cations. These ions attract each other.

Explanation: An ionic bond is formed because sodium is a part of the Alkali metals and Oxygen is a non-metal and a gas. 4Na + O2 → 2Na2O (s) OR Na + O2 → NaO2 (s).

Answer:

Explanation:

Ionic bonds form between two or more atoms by the transfer of one or more electrons between atoms. Electron transfer produces negative ions called anions and positive ions called cations. These ions attract each other.

A nucleoside triphosphate containing a 5-carbon deoxyribose sugar and the nitrogenous base thymine would be called a thymidine monophosphate.

Nucleotides are comprised of three components: a nitrogenous base, a pentose sugar, and one or more phosphate groups. Each of these elements is referred to as an "n" (nucleotide), so when we combine them all together, we get nucleotides like dATP and dTTP.

Thymidine is the name of the parent nucleotide from which derivative nucleotides are made. Thymidine monophosphate contains thymine and a phosphate group, which makes it different from other nucleotides. In this case, it has one phosphate group attached to its 5-carbon deoxyribose sugar, which is also called deoxyribonucleic acid (DNA).

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Answer:

Answer 1/6

Explanation:

To understand the connection between free energy and the equilibrium constant. The sign of a chemical reaction's standard free energy change G° determines whether the reaction will tend to proceed forward or backward. Similarly, the relative signs of G° and S° determine whether or not temperature affects the spontaneity of a chemical reaction, and if so, how much.

G is only relevant for changes where the temperature and pressure remain constant. Most laboratory reactions are performed under these conditions; the system is usually open to the atmosphere (constant pressure), and the process begins and ends at room temperature (after any heat we have added or which is liberated by the reaction has dissipated.)

The Gibbs function is crucial because it is the single master variable that determines whether a given chemical change is thermodynamically possible.

Thus, if the free energy of the reactants is greater than the free energy of the products, the entropy of the world will increase when the reaction occurs as written, and the reaction will tend to occur spontaneously. In contrast, if the free energy of the products exceeds that of the reactants, the reaction will tend to proceed in the opposite direction rather than the one specified.

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Answer:

a) gain one electron

Explanation:

When the chlorine atom reacts with the sodium atom, it creates NaCl. Sodium would be your cation and chlorine would be your anion. A sodium atom (Na) has a 1+ charge while the chlorine atom (Cl) has a 1- charge. As a result, sodium would lose a valence electron causing chlorine to gain a electron.

Answer:

The least reactive metals would be Platinum, Gold, Palladium, Osmium and Silver and in the decreasing order.

Of the following elements: Fluorine, Rubidium, Cesium, and Gold  is the LEAST reactive:

Gold

Answer:

A:

Newton's First Law of Motion is the law of inertia. It states that an object at rest will remain at rest, and an object in motion will remain in motion, unless acted upon by an unbalanced force.

B:

No, objects do not move by themselves. They require a force to move them.

Explanation:

Apply to a gas molecule's kinetic energy is not the same as telling you the speed, so calling a thermometer a speedometer for atoms is deceptive.

Uniformly, if a sample of water is put down in the freezer, its molecules begin to move slower (with a lower speed) and this is thought the back by a lower thermometer reading. It is in this feeling that a thermometer can be thought of as a speedometer. As John Rennie broaches in the comments, thermometers work for solids, liquids, and gasses, whereas the temperature is comparable to the average. A thermometer would be an average speedometer for the primary molecules of a substance or structure, not specifically separate atoms.

So we can conclude that thermometers compute the average velocity of atoms in a given material or order volume.

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A solution of 1.52 g of NH4SCN in 100 g of water in a calorimeter decreased in temperature by 3.1 °C when 3.15 g of Ba(OH)28H2O was added. Calculate the approximate amount of heat absorbed by the reaction using the following equation, assuming the specific heat of the solution and products is 4.20 J/g °C:

Ba(OH)2 + 8H2O + 2NH4SCN = 10H2O + Ba(SCN)2(aq), 2NH3(aq), and (l)

A material in one state is transferred into another substance in a different state through the process of absorption in chemistry (e.g., gases being absorbed by a liquid or liquids being absorbed by a solid).

The process of absorption is how the blood takes in the byproducts of digestion so that it can supply the rest of the body. The mucous membrane allows for the passage of the digested materials into the blood or lymph during absorption. The following mechanisms allow for absorption. basic diffusion

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Since 2 2.60 PPM singlet was seen for the /C-CH, Proton, and IHNMR data clearly showed the presence of acetophenone. IHNMR chemical with a multiplicity of 2.60 PPM is singlet, and there are 3 photons in total.

IHNMR chemical with a multiplicity of multiple number of photons of 7.49 to 7.45 PPM and a Proton number of 1. acetophenone number of photons in an IHNMR chemical with a multiplicity of 7.60 - 7.55PPM is multilaterally 2. IHNMR Chemical of multiplicity 7:98 - 7.94 PPM is multiplet no. of Proton is 2. So, Acetophenone chemical will be administered. Only one at proton comparatively shielded opposition and miter will give multiple in the benzene ring according to the IHNMR value of one singlet observed at 2–6 1 PPM. OxfordCryosystems.

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A buffer can not be made from  a strong acid and a salt.

We know that the term buffer has to do with the type of solution that we use to prevent any kind of change in the acidity or the alkalinity of a solution. In order words, the buffer is the type of solution that is used to prevent a change in the pH of the system.

Unfortunately, there can not be a buffer that is made from a strong acid and a strong base. Rather we can only have a buffer that is made from a weak acid and its salt  or a buffer that is made from a weak base and its salt.

Since HCl is  a strong acid and NaCl is a salt of  strong acid, it then follows that the combination of HCl and NaCl can never be used as a buffer.

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The volume of the solution that would result by diluting 0.1M solution to 0.05M is 100ml.

The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.

Hence, if we can write,

Molarity = moles/volume

Moles = molarity x volume

Moles are always constant, so,

initial molarity x initial volume = final molarity x final volume

The initial volume is 50ml and initial molarity is 0.1M, after diluting, the final molarity is 0.05M.

Putting values,

50 x 0.1 = Volume of NaOH after dilution x 0.05

Volume of NaOH after dilution = 100 ml.

So, the volume of the resulting solution after dilution is 100ml.

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The the the molarity of na in the saline solution of nacl in the saline solution was 0.077 M.

Molar concentration is a measure of the concentration of a chemical species, especially of a solute in a solution, in terms of the amount of substance according to the unit quantity of the solution. In chemistry, the most normally used unit for molarity is the variety of moles according to liter, having the unit symbol mol/L or mol/dm³ in the SI unit.

Calculation:-

0.45% NaCl by mass

Density = 1.005 g/ml

0.45g NaCl in a total mass of 100 g

100 g in ml = 100/1.005 mL

                  = 99.50 ml

0.450 g NaCl in moles = 0.450 /M nacl

                                     = 0.450/58.44

                                     = 7.70 × 10⁻³ mol

Molarity of NaCl = 7.70 × 10⁻³ /99.50 × 100

                           = 0.077 M

Molarity (M) is the quantity of a substance in a sure volume of answer. Molarity is defined because the moles of a solute according to liters of a solution. Molarity is also called the molar awareness of a solution.

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