Hydrolysis of Salts and pH of their Solutions

IMPORTANT

Hydrolysis of Salts and pH of their Solutions: Overview

This Topic covers sub-topics such as Salt Hydrolysis, Degree of Hydrolysis, Hydrolysis of Different Types of Salts and, Derivation of pH for Hydrolysis of a Salt of a Weak Acid with a Strong Base

Important Questions on Hydrolysis of Salts and pH of their Solutions

MEDIUM
IMPORTANT

Which one of the following statement is not true ?

EASY
IMPORTANT

The pH of 1×10-3 M H2O2 solution Ka=2.2×10-12 is:

MEDIUM
IMPORTANT

Calculate the pH of 0.1 M solution of sodium acetate Ka=1.0×10-5.

(Assume degree of hydrolysis <<<1)

HARD
IMPORTANT

The pH of a 0.1 M solution of NH4Cl is 5.13 and if the dissociation constant of NH4OH is A X 10-5, Report the value of A in the nearest integer.

HARD
IMPORTANT

Which of the following salts will give a basic solution on hydrolysis? 

MEDIUM
IMPORTANT

Which of the following salts with a concentration 0.1M will give a basic solution?

EASY
IMPORTANT

An aqueous solution of ammonium carbonate is

MEDIUM
IMPORTANT

A weak acid is titrated with a weak base. Consider the following statements regarding the pH of the solution at the equivalence point:
(i) pH depends on the concentration of acid and base.
(ii) pH is independent of the concentration of acid and base
(iii) pH depends on the pKa of acid and pKb of base.
(iv) pH is independent of the pKa of acid and pKb of base.
The correct statements are:-

MEDIUM
IMPORTANT

Solution A and B contains respectively 1 and 2 moles of CH3COONH4 in one litre. Then hydrolysis will be;

MEDIUM
IMPORTANT

If the pKa of acetic acid and pKb of dimethylamine are 4.76 and 3.26 respectively, the pH of dimethyl ammonium acetate solution is

EASY
IMPORTANT

Which among the following produces a basic aqueous solution?

HARD
IMPORTANT

2.5 mL of 25M weak monoacidic base (Kb=1×10-12 at 25C) is titrated with 215M HCl in water at  25°C.  The concentration of H+ at equivalence point is (Kw =1×10-14 at 25C).

MEDIUM
IMPORTANT

The degree of hydrolysis is dependent on concentration for:

EASY
IMPORTANT

What will be the degree of hydrolysis of 0.1 M solution of NaX? When a weak acid HX forms a salt NaX on reacting with NaOH and the dissociation constant of HX is 10-5

EASY
IMPORTANT

Out of which of the following salt , the degree of hydrolysis is independent of the concentration of salt solution - 

EASY
IMPORTANT

If the blood contains CO2 and HCO3-, what is the ratio of conjugate base HCO3- to acid H2CO3 to maintain the pH of the blood equal to 7.4 ?

[Given: pKa1 of H2CO3=6.4]

MEDIUM
IMPORTANT

Which of the following pair cannot exist together in solution?

EASY
IMPORTANT

Among the following ions, the ion(s) responsible for the acidic nature of potash alum, due to hydrolysis is/are:

EASY
IMPORTANT

How to calculate the pH of aqueous solution of Borax?

EASY
IMPORTANT

What will happen to the pH of M10 NH4CN solution on dilution?