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?

Chemistry: An Atoms First Approach
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Chapter14: Acid- Base Equilibria
Section: Chapter Questions
Problem 68E: A student dissolves 0.0100 mole of an unknown weak base in 100.0 mL water and titrates the solution...
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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?
Transcribed Image Text: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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