Question

The number of moles of hydroxide ions produced by one mole of $N{a}_{2}C{O}_3$ on hydrolysis is:

• A. $4$
• B. $2$
• C. $3$
• D. $0$

Answer 1

Answer: (B)

$2$

On hydrolysis,

$N{a}_{2}C{O}_3+2H_{2}O\rightleftharpoons 2NaOH+H_{2}C{O}_3$

$2NaOH\rightleftharpoons 2N{a}^{+}+2O{H}^{-}$

We can see that it gives two moles of hydroxide ions.