Insoluble Basic Salts

• Add the two equations (multiply the Ks):

  AgCN(s) + H3O+(aq) ? Ag+(aq) + HCN(aq) + H2O(l)
  
  K = 1.6 x 10-14 x 2.5 x 109 = 4.0 x 10-5
  = [Ag+][HCN]/[H3O+]

• Adding acid shifts the equilibrium towards products.

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