Activity on Ionization of Weak Electrolytes

• AgNO3


  Strong electrolyte
• Na2SO4


  Strong electrolyte
• HF


  Weak electrolyte
• H2SO4


  Strong electrolyte
• CH3COOH


  Weak electrolyte
• Ba3(PO4)2 dissolved in water

  1. Ba3(PO4)2(s) ⇄ 3Ba2+(aq) + 2 PO4 3-(aq)

  2. K = [3Ba2+] [2PO4 3-] / [Ba3(PO4)2]

  3. or

  4. K = [Ba2+]3 [PO4 3-]2 / [Ba3(PO4)2]
• C6H5COOH dissolved in water


  1. C6H5COOH(aq) ⇄ C6H5COO-(aq) + H+(aq)

  2. K = [C6H5COO-] [H+] / [C6H5COOH]