1) The venom of biting ants contains formic acid, HCOOH (Ka=1.8*10^-4 at 25 C). what is the pH of a 0.065 M solution of formic acid?
2) Calculate the pH of 1.00 L of a buffer that is 0.140 M HNO2 and 0.180 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M. HCl. (pKa of HNO2 = 3.40). What is the pH of the Original buffer and after HCl is added?