Sodium bicarbonate on heating decomposes to form sodium carbonate, CO2 and water. If 0.2 moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed ?

Question

Sodium bicarbonate on heating decomposes to form sodium carbonate, CO2 and water. If 0.2 moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed ? (A) 0.1 (B) 0.2 (C) 0.05 (D) 0.025

Tardigrade Admin · Accepted Answer

underset2 mol2 NaHCO 3 xrightarrowΔ underset 1 molNa 2 CO 3+ H 2 O + CO 2 ∵ 2 mol NaHCO 3 on decomposition gives =1 mol Na 2 CO 3 ∴ 0.2 mol NaHCO 3 on decomposition will give =(1/2) × 0.2 =0.1 mol Na 2 CO 3

Q. Sodium bicarbonate on heating decomposes to form sodium carbonate, $C O_{2}$ and water. If $0.2$ moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed ?

0.1

0.2

0.05

0.025

$2 m o l 2 N a H C O_{3} Δ 1 m o l N a_{2} C O_{3} + H_{2} O + C O_{2}$
$∵ 2 m o l N a H C O_{3}$ on decomposition gives $= 1 m o l N a_{2} C O_{3}$
$∴ 0.2 m o l N a H C O_{3}$ on decomposition will give
$= \frac{1}{2} \times 0.2$
$= 0.1 m o l N a_{2} C O_{3}$

Q. Sodium bicarbonate on heating decomposes to form sodium carbonate, CO2​ and water. If 0.2 moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed ?

0.1

0.2

0.05

0.025

2mol2NaHCO3​​Δ​1molNa2​CO3​​+H2​O+CO2​ ∵2molNaHCO3​ on decomposition gives =1mol Na2​CO3​ ∴0.2molNaHCO3​ on decomposition will give =21​×0.2 =0.1molNa2​CO3​

Q. Sodium bicarbonate on heating decomposes to form sodium carbonate, $C O_{2}$ and water. If $0.2$ moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed ?

$2 m o l 2 N a H C O_{3} Δ 1 m o l N a_{2} C O_{3} + H_{2} O + C O_{2}$
$∵ 2 m o l N a H C O_{3}$ on decomposition gives $= 1 m o l N a_{2} C O_{3}$
$∴ 0.2 m o l N a H C O_{3}$ on decomposition will give
$= \frac{1}{2} \times 0.2$
$= 0.1 m o l N a_{2} C O_{3}$