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(C) $Na_{2}CO_{3}$ is a salt of a strong base $(NaOH)$ and a weak acid $(H_{2}CO_{3})$.When dissolved in water,it dissociates into $2Na^{+}$ and $CO_{

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$CO_{3}^{2-}$ and water

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(C) $Na_{2}CO_{3}$ is a salt of a strong base $(NaOH)$ and a weak acid $(H_{2}CO_{3})$.When dissolved in water,it dissociates into $2Na^{+}$ and $CO_{3}^{2-}$ ions.The $Na^{+}$ ion does not undergo hydrolysis because it is the conjugate acid of a strong base.The $CO_{3}^{2-}$ ion,being the conjugate base of a weak acid $(HCO_{3}^{-})$,undergoes anionic hydrolysis:$CO_{3}^{2-} + H_{2}O \rightleftharpoons HCO_{3}^{-} + OH^{-}$Thus,the hydrolysis involves the reaction between $CO_{3}^{2-}$ and water.

The hydrolysis of sodium carbonate involves the reaction between

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