In hydrolysis of a salt of weak acid and strong base, A⁻+ H ₂ O HA + OH ⁻ , the hydrolysis constant (K_h ) is equal to

Step-by-step solution

In hydrolysis of a salt of weak acid and strong base. A⁻+ H ₂ O H A+ OH ⁻ the hydrolysis constant K_hK_h= [ HA ] [ OH ⁻ ] [A⁻ ] (According to law of mass action) ( conc. of water remains constant) For the ionisation of weak acid HA, we has HA H ⁺+A⁻K_a= [ H ⁺ ] [A⁻ ] [ HA ] Also we know that aligned & K_w K_a = [ H ⁺ ] [ OH ⁻ ][ HA ] [ H ⁺ ] [A⁻ ] & K_w K_a = [ OH ⁻ ][ HA ] [A⁻ ] aligned or K_w K_a =K_h