Explain why the aqueous solution of sodium carbonate is alkaline.

When sodium carbonate is dissolved in water it gets hydrolyzed and forms a weak acid, carbonic acid, and a strong base: sodium hydroxide. Therefore, an aqueous solution of sodium carbonate is alkaline in nature. Following is the reaction:

\(Na_{2}CO_{3}+2H_{2}Orightarrow H_{2}CO_{3}+2NaOH\)

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