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)