A 1.0-L buffer solution contains 0.100 mol HC 2 H 3 O 2 and 0.100 mol NaC

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A 1.0-L buffer solution contains 0.100 mol HC2H3O2 and 0.100 mol NaC2H3O2. The value of Ka for HC2H3O2 is 1.8 * 10-5. Because the initial amounts of acid and conjugate base are equal, the pH of the buffer is equal to pKa = -log(1.8 * 10-5) = 4.74. Calculate the new pH after adding 0.010 mol of solid NaOH to the buffer. For comparison, calculate the pH after adding 0.010 mol of solid NaOH to 1.0 L of pure water. 

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