Question

What is meant by strong acids and weak acids ? Classify the following into strong acids and weak acids :
HCl, CH3COOH, H2SO4, HNO3, H2CO3, H2SO3

Lakhmir Singh Chemistry Class 10

Answer 1

strong acids means the acids originated from inorganic salts
strong acids=HCl,H2SO4,HNO3,H2SO3
weak acids means the acids originated
by organic process
weak acids=CH3COOH,H2CO3

Answer 2

$\huge\textbf{Strong Acid}$
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→ Which ionised/dissolved completely in water to form H+ ions.

→ Almost all inorganic acids are strong acid.

→ Their pH value is 1 - 4 

→ Ex :- H2SO4, HNO3, HCl, H2SO3.
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$\huge\textbf{Weak Acid}$
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→ They ionised/dissolved incompletely in water to gave H+ ions.

→ Almost all organic acids are weak acid.

→ Their pH value is 5 - 7.

→ Ex :- CH3COOH, H2SO3.
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