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(D) Sodium carbonate $(Na_2CO_3)$ is a salt of a strong base $(NaOH)$ and a weak acid $(H_2CO_3)$.When dissolved in water,the carbonate ion $(CO_3^{2-

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Carbonate ions react with $H_2O$

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(D) Sodium carbonate $(Na_2CO_3)$ is a salt of a strong base $(NaOH)$ and a weak acid $(H_2CO_3)$.When dissolved in water,the carbonate ion $(CO_3^{2-})$ undergoes hydrolysis:$CO_3^{2-} + H_2O \rightleftharpoons HCO_3^- + OH^-$This reaction produces hydroxide ions $(OH^-)$,which increases the concentration of $OH^-$ in the solution,making it basic with a $pH > 7$.

An aqueous solution of sodium carbonate has a $pH$ greater than $7$ because

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