Question

the dissociation constant of a weak acid and weak base is 2 into 10 raise to power minus 5 and 5 into 10 raise to power minus 6 respectively find the equilibrium constant

Answer 1

HA + BOH ------------------>  B+ + A- + H2O

K = [B+][A-][H2O]/[HA][BOH]

  = [B+][OH-]/[BOH] *  [H+][A-]/[HA] *  [H2O]/[H+][OH-] = Kb *  Ka  /  Kw

now solve