Strong and Weak Acids


 
 
Concept Explanation
 

Strong and Weak Acids

Classification based on Strength of the Acid:

The strength of an acid is determined by the amount of hydrogen ions (H) that the acid provides when dissolved in water.

Strong Acids:

Some of the acids, when dissolved in water, get almost completely dissociated to provide hydrogen ions. These acids are called strong acids. For example, hydrochloric acid (HCl), nitric acid (HNO_3) and sulphuric acid (H_2S0_4) are strong acids.

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Sample Questions
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Question : 1

Weak acid among the following is :

Right Option : D
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Question : 2

Which among the following is a strong acid?

Right Option : D
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Question : 3

Which of the following are correct :

(a) The strength of an acid is determined by the amount of hydrogen ions (H) that the acid provides when dissolved in water.

(b) Hydrochloric acid (HCl), nitric acid (HNO_3) and sulphuric acid (H_2S0_4) are strong acids.

(c) Carbonic acid (H_2CO_3) and acetic acid (CH_3COOH) are weak acids.

Right Option : D
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