Question

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Question : A 2g sample containing Na2CO3 and NaHCO3 losses 0.248g when heated to 300℃, the temperature at which NaHCO3 decomposes to Na2CO3,CO2,H2O.What is the percentage of Na2CO3 in the given mixture?

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Answer 1

Answer:

At , NaHCO decomposes to form gaseous carbon dioxide, water vapor and sodium carbonate.

The balanced chemical equation representing the decomposition of sodium bicarbonate is:

Sodium bicarbonate is lost in the form of carbon dioxide gas and water vapor.

Mass of sodium bicarbonate lost = 0.248 g

Mass of

From the balanced chemical equation,

Mass of that would give 0.248 g = =

Mass % of sodium bicarbonate in the sample =

Mass % of Sodium carbonate = 100 - 33.6 % = 66.4 %