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Understanding Aqueous Equilibria: Buffer Solutions and pH Calculations

This practice quiz focuses on key concepts in aqueous equilibria, with an emphasis on buffer solutions and pH calculations. It contains three questions: identifying compounds that create a buffer with a pH above 7, calculating the pH at the equivalence point for titration of HCN with KOH, and determining the pH of a buffer solution comprised of HF and NaF. Each question will challenge your understanding of acid-base chemistry and equilibria. Strengthen your grasp of these fundamental concepts with this targeted practice.

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Understanding Aqueous Equilibria: Buffer Solutions and pH Calculations

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  1. PRACTICE QUIZ AQUEOUS EQUILIBRIA(20 points)

  2. 1. (2 points) Which of the following will make a buffer solution with a pH above 7 ? • a. 1 M NaOH and 1 M NaCl • b. 1 M HC2H3O2 and 1 M NaC2H3O2 • c. 1 M HCl and 1 M NaCl • d. 1 M NH4Cl and 1 M NH3 • 2. (10 points) Calculate the pH at the equivalence point for the titration of 75.0 mL of 0.200 M HCN with 0.300 M KOH? • (Ka = 4.0 x 10-10)

  3. 3. (8 points) What is the pH of a buffer solution containing 0.800 M HF and 0.500 M NaF? (Ka = 4.0 x 10-4)

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