Ionization of Weak Acids and Weak Bases

IMPORTANT

Ionization of Weak Acids and Weak Bases: Overview

This topic covers concepts, such as, Dissociation of Bases in Water, Ionization of Acids in Water, Relationship between Ionization Constant of Monoacidic Weak Base and Alpha & Derivation of pH Expression for Weak Acids etc.

Important Questions on Ionization of Weak Acids and Weak Bases

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IMPORTANT

A weak mono acidic base is 5% ionised in 0.1 M solution. Find the concentration of hydroxide ions.

MEDIUM
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A monoprotic acid in a 0.1 M solution ionises to 0.01%. Find its ionisation constant.

EASY
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The acidic stregth of an acid does not depends on the polarity of the bond.

EASY
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According to the polarity of the bond, the strongest acid will be

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What is the role of solvent in acidic strength?

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What is the role of polarity in acidic strength of an acid?

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Arrange the following acids in the increasing order of their acidic strength.

HF, HCl, HBr, HI

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Which of the following acid has the highest acidic strength.

EASY
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The greater the strength of H-A bond, the greater the acidic strength.

EASY
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On increasing the bond strength of an acid, the acidic strength _____.

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How does the bond strength affect the acidic strength.

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The pH of 0.1 M acetic acid solution is closest to [Dissociation constant of the acid, Ka=1.8×10-5]

EASY
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Which of the following equation follows for base ionization constant is expressed in terms of concentration in molarity of various species in equilibrium.

MEDIUM
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Calculate the concentration of A- ions in the solution of 0.01 M HA.

Ka=4×10-10

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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
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Which of the following will occur if a 0.1 M solution of a weak acid is diluted to 0.01 M at constant temperature?

MEDIUM
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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
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Which of the following is a weak alkali?

MEDIUM
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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: