Calculate the pH of buffer solution containing 0.1M CH ₃ COOH and 0.1 M CH ₃ COONa [K_a = 1.8 10⁻⁵]

Step-by-step solution

Using the Henderson-Hasselbalch equation for an acidic buffer: pH = p K_a + ( [ Salt ] [ Acid ] ) Given [ Salt ] = 0.1 M and [ Acid ] = 0.1 M pH = - (1.8 10⁻⁵) + ( 0.1 0.1 ) pH = 5 - (1.8) + (1) pH = 5 - 0.255 + 0 = 4.745 Answer: 4.745