(i) As K2CO3 is a salt of a strong base (KOH) and weak acid (H2CO3), it hydrolyses in water to give alkaline solutions. They have pH more than 7, hence it will have no effect on blue litmus.
(ii) KCl is a salt of a strong acid (HCl) and a strong base (KOH). Hence it’s aqueous solution will be neutral in nature and will have no effect on blue litmus.
(iii) NH4NO3 is a salt of a strong acid (HNO3) and weak base (NH4OH), it hydrolyses in water to give an acidic solution. They have pH less than 7, hence will turn blue litmus red.
1. Name the apparatus ‘A’.2. Name the substance ‘X’ placed in ‘A’ and the substance ‘Y’ placed in B.3. State the reason for conducting the titration using the apparatus ‘A’ and ‘B’.4. State which solution is transferred to the evaporating dish and evaporated to point of crystallization for obtaining the salt.5. State why titration is not conducted for the preparation of copper [II] sulphate crystals by neutralization.