Question

. A white crystalline solid X when heated forms a compound Y (which is red/orange when cold and yellow when hot), a brown gas Z and a colourless, odourless gas P (which is essential to living organisms). Identify X, Y, Z and write the chemical reaction involved. What is the nature of the chemical reaction taking place?

Answer 1

Answer:

X=NaHCO3 ; Y=Na2CO3 ; Z=CO2

Explanation:

carbon dioxide(Z) is an acidic oxide is produced on heating sodium bicarbonate (X) while the formation of sodium carbonate (Y).  

2NaHCO  3  (X)→Na 2 CO3(Y)+CO  2  (Z)+H  2 O

The carbon dioxide gas is also given out when sodium bicarbonate reacts with an acid.  

NaHCO  3 (X)+HCl→NaCl+CO  2 (Z)+H  2 O

The sodium carbonate is formed if caustic soda is left open in the atmosphere.

2NaOH+CO  2 (Atmosphere)→Na  2 CO  3  (Y)+H  2O