Question

The hydrolysis of sodium carbonate involves the reaction between

• A. sodium ion and water
• B. $Na^{+}$ and $OH^{-}$
• C. $CO_{3}^{2-}$ and water
• D. $CO_{3}^{2-}$ and $H^+$

Answer 1

Answer: (C)

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

Answer 2

$Na _{2} CO _{3}+2 H _{2} O \rightleftharpoons 2 NaOH + H _{2} CO _{3}$

or $2 Na ^{+} + CO _{3}^{2-}+2 H _{2} O$

$\rightleftharpoons 2 Na ^{+}+2 OH ^{-}+ H _{2} CO _{3}$

or $CO _{3}^{2-}+2 H _{2} O \rightleftharpoons 2 OH ^{-}+ H _{2} CO _{3}$

It is anionic hydrolysis.