1.

Explain the Arrhenius concept of acid and base with example.

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Solution :(i) According to Arrhenius CONCEPT an acid is a substance that dissociates to given hydrogen IONS in water. For example
`HCl_(g) leftrightarrow^(H_2O) H^+ (AQ)+ CL^(-) (aq)`
(ii) Similarity a base is the substance that dissociates to given HYDROXYL ions in water For example.
`Ca(OH)_2 leftrightarrow^(H_2O) Ca^(2+) (aq) +2OH^(-) (aq)`


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