Ionization of Acids and Bases

IMPORTANT

Ionization of Acids and Bases: Overview

This topic covers concepts such as Dissociation of Bases in Water, Ionization of Acids in Water, Ionization of Acids and Bases, Degree of Dissociation for Acids and Bases, Strengths of Acids and Bases, Relative Strengths of Acids and Bases, etc.

Important Questions on Ionization of Acids and Bases

EASY
IMPORTANT

The degree of dissociation is inversely proportional to the square root of the concentration of the weak base.

EASY
IMPORTANT

The degree of dissociation is _____ proportional to the square root of the concentration of the weak base.

EASY
IMPORTANT

What is the relationship between degree of dissociation and dissociation constant of the weak base?

EASY
IMPORTANT

Explain the reason for the smaller value of higher order ionization constants than the lower order ionization constant of polyacidic bases.

EASY
IMPORTANT

Define polyacidic bases and give some examples.

MEDIUM
IMPORTANT

Ionisation constant of  CH3COOH is 1.7×10-5 and concentration of H+ ions is 3.4×10-4. Then, the initial concentration of CH3COOH is 

MEDIUM
IMPORTANT

The Ka values of formic acid and acetic acid are respectively 1.77×10-4 and 1.75×10-5. The ratio of acid strength of 0.1 N acids is

EASY
IMPORTANT

Which of the following is a weak alkali?

EASY
IMPORTANT

Define the degree of dissociation of electrolytes.

MEDIUM
IMPORTANT

The pH of an aqueous solution of 10-8MHCl is

MEDIUM
IMPORTANT

NH3 is dissolved in water.

NH3 + H2O NH4++OH-

Its base dissociation constant is given by:

EASY
IMPORTANT

Select the weak base from the following:

MEDIUM
IMPORTANT

The increasing order of base strength is

HARD
IMPORTANT

Arrange in decreasing order of acidity?

(P) Question Image (Q) Question Image (R) Question Image (S) Question Image

HARD
IMPORTANT

The correct order of increasing H3O+ in the following aqueous solution is 

HARD
IMPORTANT

What is the decreasing order of strength of bases? 
OH-, NH2-, H-CC- and CH3-CH2-

HARD
IMPORTANT

The relation between pH, pKa and concentration c of the solution of a weak acid can be written as _____.

(A) pH=12pKa-logc

(B) pH=12pKa+logc

(C) pH=pKa-logc

Enter the correct answer as A, B or C.

MEDIUM
IMPORTANT

If the acid-base reaction HA(aq)+B-(aq)HB(aq)+A-(aq) has a Keq=10-4 , then is the given statement  correct or incorrect?

 A- is stronger base than B-.

HARD
IMPORTANT

If the acid-base reaction HA(aq)+B-(aq)HB(aq)+A-(aq) has a Keq=10-4  then the given statement is correct or incorrect?

B- is stronger acid than A-.

MEDIUM
IMPORTANT

If the acid-base reaction HA(aq)+B-(aq)HB(aq)+A-(aq) has a Keq=10-4, which of the following statements are true?

(i)  HA is more acidic than HB.

(ii) HB is more acidic than HA.

(iii) HA and HB have the same acidity.