Chemistry - Salt Analysis Question with Solution | TestHub

Salt 'X' reacts with dilute H₂SO₄ to produce gas (B) and H₂O. This indicates 'X' is a carbonate, producing CO₂ gas.

Salt 'Y' reacts with concentrated H₂SO₄ to produce gases (B) and (C) and H₂O. This indicates 'Y' is an oxalate, producing CO and CO₂ gases.

Thus, X contains CO₃²⁻ and Y contains C₂O₄²⁻.

The reactions are:

For Salt 'X' (e.g., CaCO₃):

$${\mathrm{CaCO}}_3(s)+{\mathrm{H}}_2{\mathrm{SO}}_4(aq)\to {\mathrm{CaSO}}_4(aq)+{\mathrm{H}}_2\mathrm{O}(l)+{\mathrm{CO}}_2(g)$$

Here, (B) is CO₂ gas.

For Salt 'Y' (e.g., CaC₂O₄):

$${\mathrm{CaC}}_2{\mathrm{O}}_4(s)+{\mathrm{H}}_2{\mathrm{SO}}_4(conc)\to {\mathrm{CaSO}}_4(aq)+{\mathrm{H}}_2\mathrm{O}(l)+\mathrm{CO}(g)+{\mathrm{CO}}_2(g)$$

Here, (B) is CO₂ gas and (C) is CO gas.

Therefore, salt 'X' contains CO₃²⁻ and salt 'Y' contains C₂O₄²⁻.