Question

1. Potassium carbonate cannot be prepa-
red by Solvay's process.why??

ii. CO, turns the lime water milky. On pas-
sing co, in excess, milkiness disap-
pears.why??

Answer 1

Answer:

1.Solvay process cannot be used to prepare potassium carbonate. This is because unlike sodium bicarbonate,potassium bicarbonate is fairly soluble in water and does not precipitate out.

Answer 2

2. Carbon dioxide passed into limewater gives a milky solution, due to precipitation of an insoluble suspension of calcium carbonate: Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O. If excess CO2 is added, the following reaction takes place: ... The milkiness disappears since calcium bicarbonate is water-soluble.