Q2) A student prepared a buffer solation by mixing 500.0nl at 0.200M acetic acid (ka=1.8105) with 3.46g of sodium ccetat. a) Calculet the pH of this buffer. b) what volume of 0.040MHCl is requined to change the pH of the buffer by 2.5 units. c) What will be the pH change if The stadent added the same amount of HCl (in b) to a) Calculete the pH of this buffer. b) What volume \&t 0.040MHCl is required to change the pH of the buffer by 2.5 units. c) What will be the pH change if The student added the same amount of HCl (in b) to 500.0mL of pure water