Insoluble Basic Salts

• Metal hydroxide solubility depends on the pH.

• Mg(OH)2(s) ? Mg2+(aq) + 2OH-(aq)

• Adjust the pH to adjust the solubility.

• AgCN(s) ? Ag+(aq) + CN-(aq)

  Ksp = 1.6 x 10-14
  

• Add HNO3 (why not HCl?) to dissolve:

• CN-(aq) + H3O+(aq) ? HCN(aq) + H2O(l)

  K = 2.5 x 109
  

Kotz Cd: 19m11vd1

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