A chemist is working with a formic acid � formate ion buffer system. HCHO2(aq) + H2O(l)...

A chemist is working with a formic acid � formate ion buffer system.

HCHO₂(aq) + H₂O(l) <=> CHO₂^-(aq) + H₃O⁺(aq) with K_a = 1.7�10^-4

One liter of the buffer contains 0.745 moles of formic acid and 0.385 moles of formate ion. What is the pH of the buffer? (Answer to 3 significant figures, no units.)

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Solid sodium hydroxide (6.83 grams) is added to one liter of the formic acid � formate ion buffer described in the previous question. Assume the total volume has not changed significantly once the strong base has dissolved. What is the new pH of the buffer? (Answer to 3 significant figures, no units.)

Expert Solution

queen_honey_blossom answered 3 weeks ago

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