Question: Ka for formic acid is 1.7 10-4 at 25C. A buffer is made by mixing 529 mL of 0.465 M formic acid, HCHO2, and

Ka for formic acid is 1.7 × 10-4 at 25°C. A buffer is made by mixing 529 mL of 0.465 M formic acid, HCHO2, and 494 mL of 0.524 M sodium formate, NaCHO2. Calculate the pH of this solution at 25°C after 110. mL of 0.152 M HCl has been added to this buffer.

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