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 textmol2NaHCO3 xrightarrowΔ underset1 textmolNa2CO3 + H2O + CO2 ∵ 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

$2 mol 2 N a H C O_{3} Δ 1 mol N a_{2} C O_{3} + H_{2} O + C O_{2}$
$∵ 2 m o l N a H C O_{3}$
on decomposition gives $= 1 m o lN a_{2} C O_{3}$
$∴ 0.2 m o lN a H C O_{3}$
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 =1molNa2​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?

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