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

A strong acid is one that completely ionises in water to form a large amount of hydrogen ion

A weak acid is that one which partially dissociates in aqueous and produces small amount of hydrogen ions.

HCl, H2SO4, HNO3 are strong acids CH3COOH, H2CO3, H2SO3 are weak acids