Formic Acid Is a Monoprotic Acid with a K_a Value $\times$

question 3

Essay

Formic acid is a monoprotic acid with a K_a value of 1.8 $\times$ 10^-4 at 25°C.
a.Calculate the pH of a 0.200 mol L^-1 solution of the acid,making any reasonable approximations.
b.If 0.0050 mol of NaOH is added to 100.mL of the solution in (a),calculate the pH of the resultant buffer.

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