12. Assuming equal concentrations of conjugate base and acid, which of the following mixtures is suitable for making a buffer solution with an optimum pH of 9.2-9.3? А. CH3COONA / CH3COOH (Ka = 1.8 x 10) В. NaOCI / HOCI (Ka = 3.2 x 10-8) С. NH3 / NH,CI (Ka = 5.6 x 10-10) D. NANO2 / HNO2 (Ka = 4.5 x 10)

Q: 1. Calculate the pH of an acetate buffer prepared by dissolving sodium acetate (5.21 g) and acetic…

A:

Q: 4. Formic acid, HFor, has a K value of 1.8 x 10-4. You need to prepare 150 mL of a buffer hav- ing a…

A: Buffer are the solution which are made on mixing weak acid or weak base with the salt of its…

Q: Consider the titration of 20.0 mL of a sample of 0.105 M HC2H3O2 with 0.125M NaOH. (Ka = 1.8 x 10-5)…

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Q: The bicarbonate/ carbonic acid buffer is of extreme importance to our bodies. The pH of importance…

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Q: 13. 30 ml of 0.20 M NH,OH & 25 ml of 0.20 HCl are mixed. What is the pH? K = 1.8 X 10% Calculate the…

A: NH4OH is weak base and when it combines with limiting strong acid, HCl then a basic buffer is…

Q: 4. How many grams of sodium lactate, NAC3H5O3, should be added to 1.0OL of 0.150M lactic acid,…

A: To calculate the grams of sodium lactate , we would use Henderson Hasselbalch equation.

Q: 1. What is the pH of a buffer prepared by mixing 20.0 g of acetic acid (HC₂H302) and 20.0 g of…

A: Given :  Mass of acetic acid = 20.0 g  Mass of sodium acetate = 20.0 g  Volume of solution = 2.00 L…

Q: What is the pH of a buffer that is made by mixing 20.0 mL of 0.10 M H,CO3 and 10.0 mL of 0.20 M…

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Q: Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of sodium cyanate (NaCNO) and…

A: Given information,    0.20 mole of sodium cyanate (NaCNO) and 1.0 mole of cyanic acid (HCNO)…

Q: 12. What volume (in mL) of a 0.150 M Na2SO3 solution must be added to 20.0 mL of a 0.120 M NaHSO3…

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Q: What will be the pH when 50.0 ml of 2.00M carbonic acid is mixed 20.0 ml of 3.00 M sodium…

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Q: 8. Calculate the pH of an aqueous solution containing the following: a. 0.80 M lactic acid and 0.40…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 7. Which of the following conjugate acid-base pair would you choose to prepare a buffer solution…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: 9. To prepare a basic buffer of pH=10 how many grams of NH,Cl would you add to 100 ml of 0.1 M NH¸OH…

A: The Henderson Hasselbalch equation for basic buffer is given as:

Q: The pH at the equivalence point is estimated as 7.93. Which indicator is most suitable for the…

A: The reaction between HF and NaOH is HF (aq) + NaOH (aq) -----> NaF (aq) + H2O (l) Given that pH…

Q: 1.0mL of 6.0M HCl is added to 100mL of a buffer that contains equal moles of acetic acid (CH3COOH,…

A: Initial pH of the buffer containing equal moles of acetic acid and sodium acetate can be given as:…

Q: 4. You need to make a buffer with pH as close to 10.00 as possible. Two sets of weak acids and…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: It is desired to prepare a buffer solution with a pH equal to 10 with the ethylamine-ethylammonium…

A: To calculate the weight of ethyl ammonium chloride, we have to use the Henderson Hasselbalch…

Q: A student is asked to prepare a buffer solution at pH = 8.60, using one of the following weak acids:…

A: Given : pH = 8.60

Q: 4. How many grams of sodium lactate, NaC3H5O3, should be added to 1.00L of 0.150M lactic acid,…

A:

Q: What is the pH of a buffer solution that is 0.214 M in ammonia and 0.390 M in ammonium chloride…

A: First calculate Ka value for ammonia and use it to calculate the pH of the buffer solution.

Q: Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is…

A:

Q: Please calculate the pH of a buffer solution made up of formic acid and sodium formate. The solution…

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Q: what volume of Boric acid 0.1 M and what volume of sodium hydroxide 0.1 M should be added together…

A: Step 1: Here, the amount of desired buffer solution is not given so it should be assumed as 100mL (…

Q: A solution is prepared at 25 °C that is initially 0.077M in trimethylamine ((CH³)¸N), a weak base…

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Q: If the dissociation constant of a weak acid is 8.1 x 100, at what ratio should you adjust the…

A:

Q: pKa What is the color of this indicator in a solution with pH = 3? purple blue red about us careers…

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Q: Determine the mass of solid NaCH,COO that must be dissolved in an existing 500.0 mL solution of…

A: Buffer solution is the one which resists pH change on addition of small amount of acid or base in…

Q: What is the pH of a buffer prepared by mixing 5.0 g of ammonia (NH3) and 20.0 g of ammonium chloride…

A: Since you have posted multiple questions, we'll answer the first one. If you want any other question…

Q: What is the pH of a buffer solution that is 0.602 M in hydrofluoric acid and is 0.455 M is potassium…

A:

Q: What mass (in grams) of sodium acetate (CH3COONa) must be added to 100.00 mL of a 0.115 M solution…

A: Given data contains, Volume of solution = 100 mL = 0.100 L [CH3COOH] = 0.115 M pH of the solution =…

Q: Dino needs to prepare 200.0 mLs of a 0.25M /0.20 M buffer solution that has pH of 4.7. To make this…

A: Answer:Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: pH of a buffer solution

A:

Q: 4. What is the pH of a buffer made from 0.42 M H3BO3 and 0.22 M H2BO3-, if the Ka for H3BO3 is 7.3 x…

A:

Q: 3. A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to…

A: Buffer solutions The solution that resists any change in pH is known as buffer solution. pH of such…

Q: Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is the…

A: Buffer is an aqueous solution of a weak acid and its conjugate base or weak base and its conjugate…

Q: Consider a buffer solution that is 0.550M formic acid(HCOOH) and 0.450M sodium formiate. Ka (formic…

A: The solution contains weak acid HCOOH and its conjugate base.

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.