1.

A mixture of sodium carbonate and sodium bicarbonate was subjected to heating. Some loss in weight was found. How does this information help us tofind out thecomposition of mixture?

Answer»

Solution :Between SODIUM carbonate and sodium bicarbonate, only sodium bicarbonate DECOMPOSES to given sodium carbonate, `CO_(2) and H_(2)O`. The GASEOUS products `(CO_(2) and H_(2)O)` ESCAPE out into theatmosphere. Therefore, an apparent loss in WEIGHT occurs during thereaction.
This loss in weight corresponds to theamount of gaseous products formed . Fromed the mass of gaseous products formed, amount of sodium bicarbonate in the mixture can be obtained, andthus composition of the mixture of the mixture can be found out.


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