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9. Suppose a buffer is composed of 2.4 M Potassium Formate (HCOOK) and 1.6 M Formic Acid (HCOOH), pKa = 3.75 for HCOOH. a. Find the pH of the buffer. b. Find the pH after the addition of 100 mL of 1.5 M HCl to 1.0 L of the buffer in part a.