Chemistry, asked by shannu8593, 1 year ago

How to distinguish between sodium carbonate and sodium sulphate using a reagent?

Answers

Answered by jarpana2003
4

(1) Sodium carbonate gives a white precipitate of magnesium carbonate on mixing with magnesium sulphate solution.

Na2CO3 (aq) + MgSO4 (aq) = MgCO3 (s) + Na2SO4 (aq)

Sodium bicarbonate does form a precipitate with MgSO4 solution as magnesium bicarbonate is soluble in water.

Instead of MgSO4 solution, a solution of MgCl2 or CaCl2 can also be used. The results will be similar.

(2) On heating, sodium bicarbonte easily decomposes to give carbon dioxide, which turns lime water milky.

2NaHCO3 = Na2CO3 + CO2 + H2O

Na2CO3 does not decompose even at moderately high temperatures.


Answered by Anonymous
0

Sodium carbonate gives a white precipitate of magnesium carbonate on mixing with magnesium sulphate solution. Sodium bicarbonate does form a precipitate with MgSO4 solution as magnesium bicarbonate is soluble in water. Instead of MgSO4 solution, a solution of MgCl2 or CaCl2 can also be used.

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