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a. What is the pH of the buffer prepared by mixing 250. mL of 0.200 M...

a. What is the pH of the buffer prepared by mixing 250. mL of 0.200 M benzoic acid and 100. mL of 0.250M NaOH? pKa=4.19

b. A buffer containing 1.00 M concentrations of HOAc and NaOAc has a pH of 4.742. (a) What is the pH of the soln’ after 0.0100 mol of HCl has been added to 1.00 L of the buffer? (b) What is the pH of the soln’ after the addition of 0.0100 mol of NaOH? (c) What is the buffer capacity and pH change for each soln’ [ in (a) and (b)]?

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