HARD
12th Tamil Nadu Board
IMPORTANT
Earn 100

Calculate the hydrolysis constant of NH4Cl: determine the degree of hydrolysis of this salt in 0.01 M solution and the pH of the solution.

KbNH4OH=1.8×10-5

Important Questions on Ionic Equilibrium

MEDIUM
12th Tamil Nadu Board
IMPORTANT
What is the maximum concentration of equimolar solutions of ferrous sulphate and sodium sulphide so that when mixed in equal volumes, there is no precipitation of iron sulphide? (For iron sulphide, Ksp=6.3×10-18).
MEDIUM
12th Tamil Nadu Board
IMPORTANT
What is the minimum volume of water required to dissolve 1g of calcium sulphate at 298K? (For calcium sulphate, Ksp is 9.1×10-6).
MEDIUM
12th Tamil Nadu Board
IMPORTANT
The concentration of sulphide ion in 0.1 M HCl solution saturated with hydrogen sulphide is 1.0×10-19 M. If 10 mL of this is added to 5 mL of 0.04 M solution of the following: FeSO4, MnCl2, ZnCl2 and CdCl2. In which of these solution precipitation will take place?
MEDIUM
12th Tamil Nadu Board
IMPORTANT
If the solubility product of CuS is 6×10-16, calculate the maximum molarity of CuS in aqueous solution.
HARD
12th Tamil Nadu Board
IMPORTANT

The solubility product of AgCl in water is 1.5×10-10. Calculate its solubility in 0.01 M NaCl solution.

 

 

 

HARD
12th Tamil Nadu Board
IMPORTANT

Calculate the pH at which Mg(OH)2 begins to precipitate from a solution containing 0.10 M Mg2+ ions. Ksp of Mg(OH)2=1×10-11

MEDIUM
12th Tamil Nadu Board
IMPORTANT
Which substance on mixing with ammonium hydroxide forms a buffer solution?
MEDIUM
12th Tamil Nadu Board
IMPORTANT
The Ka of propionic acid is 1.84×105. What is the pH of a solution containing 0.5 M propionic acid and 0.5 M sodium propionate ?