Chapter 17, Problem 64IAE

You are given 250.0mL of 0.100M CH3 CH2 COOH (propionic acid, $K_g=1.35\times {10}^{-5}$ ). You want its pH by adding an appropriate solution. What volume would you add of (a) 1.00 M HCl to lower the pH to 1.00; (b) 1.00M ${\text{NaCH}}_{\text{2}}{\text{CH}}_{\text{2}}$ COO to raise the pH to 4.00; (c) water to raise the pH by 0.15 unit?