Ionic EquilibriumCode: QIE-01 Student name:______________________ Date:__-__-__

1. Calculate the maximum pH of a 0.1M Mg2+, solution for which Mg(OH)2 will not be precipitated

2. 0.1M solution of NH4OH is 1.344% dissociated , calculate (i)Kb (ii)

3. The solubility product of Ca(OH)2 at 250C is . A 500ml of saturated solution of Ca(OH)2 is mixed with equal volumes of 0.4M NaOH solution . How much Ca(OH)2 in milligrams is precipitated.

4. What is the concentration of ions in H2S in the presence of HCl producing 0.3g atom of per liter? If the solubility product of CdS is 3.6x10-29. Will it be precipitated by the above solution

containing0.1g ion of Cd2+ ions per liter?

5. Calculate the pH at which begins to precipitate from a solution containing 0.1M

ions

6. How much volume of 0.001M HCl (aq) should be added to 10cm3 of 0.001M MaOH to change its pH by one unit?

7. Calculate the hydrolysis constant, degree of hydrolysis and hydrogen ion concentration in 0.1N NH4Cl

solution and

8. 0.005M solution of has a pH of 9.25 at 250C . Calculate the degree of hydrolysis and the

hydrolysis constant, taking the value of . Also determine the dissociation constant of

9. The solubility of CaF2 in water at 298K is grams per 10cm3. Calculate the solubility product of CaF2 at 298K.

10. . Find its solubility in pure water and in 0.1M BaCl2.

11. Calculate the amount of in grams which must be added to 500mL of 0.2M NH3 to yield

solution a solution of . Kb for NH3 .

12. Calculate the ration of pH of a solution containing 1 mole of + 1 mole of HCl per liter

and of other solution containing I mole of +1 mole of per liter.

13. 100mL of HCl gas at 250C and 740mm pressure were dissolved in 1L of H2O . Calculate the pH of the solution. Given, VP of H2O at 250C is 23.7.

14. Calculate and in a solution that is 0.02M in acetic acid

and 0.01M in benzoic acid.