A mixture of sodium oxide and calcium oxide i | vedclass

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Question

(C) When $Na_2O$ and $CaO$ are dissolved in water,they form $NaOH$ and $Ca(OH)_2$ respectively.$Na_2O + H_2O \longrightarrow 2NaOH$$CaO + H_2O \longri

Vedclass · Accepted Answer

basic; $Na_2CO_3$ and $Ca(HCO_3)_2$

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(C) When $Na_2O$ and $CaO$ are dissolved in water,they form $NaOH$ and $Ca(OH)_2$ respectively.$Na_2O + H_2O \longrightarrow 2NaOH$$CaO + H_2O \longrightarrow Ca(OH)_2$When this mixture is saturated with excess $CO_2$,the hydroxides react to form bicarbonates:$2NaOH + 2CO_2 \longrightarrow 2NaHCO_3$$Ca(OH)_2 + 2CO_2 \longrightarrow Ca(HCO_3)_2$Since $NaHCO_3$ is a salt of a strong base $(NaOH)$ and a weak acid $(H_2CO_3)$,the solution is basic due to the hydrolysis of the bicarbonate ion $(HCO_3^- + H_2O \rightleftharpoons H_2CO_3 + OH^-)$.

Compound	Uses
$1. CaCO_3$	$a.$ In purification of coal gas
$2. Ca(OH)_2$	$b.$ As an antacid
$3. CaO$	$c.$ In paper and textile industries
$4. Na_2CO_3 \cdot 10H_2O$	$d.$ In glass and leather industries

$A$ mixture of sodium oxide and calcium oxide is dissolved in water and saturated with excess carbon dioxide gas. The resulting solution is ...... It contains ......... :

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Compound Uses

$1. CaCO_3$ $a.$ In purification of coal gas

$2. Ca(OH)_2$ $b.$ As an antacid

$3. CaO$ $c.$ In paper and textile industries

$4. Na_2CO_3 \cdot 10H_2O$ $d.$ In glass and leather industries

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