Ionic Equilibrium Five Marks Questions

12th Standard EM

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Chemistry

Time : 01:30:00 Hrs
Total Marks : 60
    12 x 5 = 60
  1. Solubility product of Ag2 CrO4 4 is \(1\times10^{-12}\).What is the solubility of Ag2 CrO4 in 0.01M AgNO3 solution?

  2. Write the expression for the solubility product of Ca3 (PO4)2

  3. A saturated solution, prepared by dissolving CaF2(s) in water, has \([Ca^{2+}]=3.3\times10^{-4}M\) What is theKsp of CaF2?

  4. Ksp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO3

  5. A particular saturated solution of silver chromate Ag2 CrO4 has \([Ag^{+}]=5\times10^{-5}\) and \([CrO_{4}]^{2-}=4.4\times10^{-4}M\).What is the value of Ksp for Ag2 CrO4?

  6. Write the expression for the solubility product of Hg2Cl2 .

  7. Ksp of Ag2 CrO4 is \(1.1\times10^{-12}\).what is solubility of Ag2 CrO4 in 0.1M K2 CrO4.

  8. Will a precipitate be formed when 0.150 L of 0.1M Pb(NO3)2 and 0.100L of 0.2 M NaCl are mixed?\(K_{sp}\quad(PbCl_{2})=1.2\times10^{-5}\).

  9. Ksp of Al(OH)3 is 1\(\times\)10-15M. At what pH does 1.0×10-3M Al3+ precipitate on the addition
    of buffer of NH4Cl and NH4OH solution?

  10. What is the pH of an aqueous solution obtained by mixing 6 gram of acetic acid and 8.2 gram of sodium acetate and making the volume equal to 500 ml. (Given: Ka for acetic acid is  \(1.8\times10^{-5}\))

  11. Calculate i) the hydrolysis constant, ii) degree of hydrolysis and iii) pH of 0.1M CH3COONa solution (pKa for CH3COOH is 4.74).

  12. Establish a relationship between the solubility product and molar solubility for the following
    a) BaSO b)Ag2(CrO4)

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