Question

Salt 'P', commonly used in bakery products, on heating gets converted into another salt 'Q' which itself is used for the removal of hardness of water and a gas 'R' is evolved. The gas 'R' when passed through freshly prepared lime water turns milky. Identify 'P', 'Q' and 'R', giving chemical equation for the justification of your answer.

Answer 1

Answer:

p - NaHCo3

Q - Na2Co3

R - Co2

Answer 2

NaHCO3 , Na2CO3  and CO2

Explanation:

The salt most commonly used in bakery is Sodium bicarbonate (P). On heating sodium bicarbonate, sodium carbonate is (Q) formed, which is for removal of hardness of water. The gas evolved in this process is Carbon Dioxide (R). CO2 turns freshly prepared lime water milky.

P - Sodium bicarbonate - NaHCO3

Q - Sodium carbonate - Na2CO3

R - Carbon dioxide - CO2