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A solution is made by mixing 0.400M in formic acid, HCOOH, and 1.00M in sodium formate, HCOONa? Ka=1.80x10-4. The total volume is 1.00L. What is

A solution is made by mixing 0.400M in formic acid, HCOOH, and 1.00M in sodium formate, HCOONa? Ka=1.80x10-4. The total volume is 1.00L. What is the pH of this solution upon the addition of 0.075moles of HCl?

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