b) Is phosphate a good buffer at pH 6? Explain your reasoning.3. Calculate the pH of a 500 mL solution of pure water to which has been added 25 mL of 1 mM HCl.4. Calculate the pH of a IL solution containing 10 mL of 2 M acetic acid and 5 g of sodium acetate (formulaweight 82 g/mol).5. A solution is made by mixing 50 mL of 2.0 M K2HPO4 and 25 mL of 2.0 M KH2PO4. The solution isdiluted to a final volume of 200 mL. What is the pH of the final solution?6. What is the pK of the weak acid HA if a solution containing 0.1 M HA and 0.2 M A has a pH of 6.5?

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Answered: 3. Calculate the pH of a 500 mL…

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3. Calculate the pH of a 500 mL solution of pure water to which has been added 25 mL of 1 mM HCl.

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 95AP

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Concept explainers

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.

Question

b) Is phosphate a good buffer at pH 6? Explain your reasoning.
3. Calculate the pH of a 500 mL solution of pure water to which has been added 25 mL of 1 mM HCl.
4. Calculate the pH of a IL solution containing 10 mL of 2 M acetic acid and 5 g of sodium acetate (formula
weight 82 g/mol).
5. A solution is made by mixing 50 mL of 2.0 M K2HPO4 and 25 mL of 2.0 M KH2PO4. The solution is
diluted to a final volume of 200 mL. What is the pH of the final solution?
6. What is the pK of the weak acid HA if a solution containing 0.1 M HA and 0.2 M A has a pH of 6.5?

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