By how much would the ph change

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Consider a solution of a weak acid at a pH equal to its pKa. By how much would the pH change, and in which direction, if we added to this solution enough base to neutralize 10% of the total acid?

Answer
0.18, lower
0.10, higher
0.10, lower
0.40, higher
0.18, higher

Reference no: EM13167227

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