### Compute the ratio of acid to salt at ph 5

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a. For a weak acid with a pKa of 6.0, show how you would calculate the ratio of acid to salt at pH 5.

b. Suppose you have just added 100 mL of a solution containing 0.5 mol of acetic acid per liter to 400 mL of 0.5 M NaOH. What is the final pH?

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