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What is the pH change of a buffer that has 0.100 mol HC2H3O2 and 0.130 mol...

What is the pH change of a buffer that has 0.100 mol HC2H3O2 and 0.130 mol NaC2H3O2 in 1.00 L after 0.010 mol HCl added to it? pKa = 4.74

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