Salt A,commonly used in bakery products,on he | vedclass

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Question

(A) The salt $A$ used in bakery products is baking soda,which is sodium hydrogen carbonate $(NaHCO_3)$.On heating,it undergoes thermal decomposition a

Vedclass · Accepted Answer

$A = NaHCO_3, B = Na_2CO_3, C = CO_2$

Vedclass · Answer

(A) The salt $A$ used in bakery products is baking soda,which is sodium hydrogen carbonate $(NaHCO_3)$.On heating,it undergoes thermal decomposition as follows:$2NaHCO_3 \xrightarrow{\Delta} Na_2CO_3 + H_2O + CO_2 \uparrow$Here,$B$ is sodium carbonate $(Na_2CO_3)$,which is used for the removal of permanent hardness of water.The gas $C$ evolved is carbon dioxide $(CO_2)$.When $CO_2$ gas is passed through lime water $[Ca(OH)_2]$,it forms calcium carbonate $(CaCO_3)$,which makes the solution milky:$Ca(OH)_2 + CO_2 \rightarrow CaCO_3 + H_2O$Thus,$A = NaHCO_3$,$B = Na_2CO_3$,and $C = CO_2$.

Salt $A$,commonly used in bakery products,on heating gets converted into another salt $B$,which itself is used for the removal of hardness of water,and a gas $C$ is evolved. The gas $C$,when passed through lime water,turns it milky. Identify $A$,$B$,and $C$.

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