Question

10 g $CaC{O}_3$ is completely decomposed to X and CaO. X is passed into an aqueous solution containing one mole of sodium carbonate. What is the number of moles of sodium bicarbonate formed?
[Molar mass: $CaC{O}_2\left(100\right);N{a}_{2}C{O}_3\left(106\right);NaHC{O}_3\left(84\right)]$.

• A. 0.2
• B. 0.1
• C. 0.01
• D. 10

Answer 1

The correct option is A 0.2

ANS: A

$N{a}_{2}C{O}_3+C{O}_2+H_{2}O\to 2NaHC{O}_3$

mole of $CaC{O}_3$ =0.1

mole of X i.e. $C{O}_2$ = 0.1

Mole of $N{a}_2$ $CO_3$ = 1

here limiting agent is $C{O}_2$

so according to reaction number of mole of $NaHC{O}_3$ = 0.2