A mixture contains Na2CO3 and NaHCO3 and wt. of mixture is 10gm. Mixture on heating liberates 56ml of CO2 at S.T.P, wt of Na2CO3 in mixture is
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Answer:
11th
Chemistry
Some Basic Concepts of Chemistry
Stoichiometry and Stoichiometric Calculations
19 g of a mixture containin...
CHEMISTRY
19 g of a mixture containing NaHCO
3
and Na
2
CO
3
on complete heating liberated 1.12 L of CO
2
at STP. The weight of the remaining solid was 15.9 g. What is the weight (in g) of Na
2
CO
3
in the mixture before heating?
October 15, 2019
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Mahalakshmi Mathew
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VIDEO EXPLANATION
ANSWER
NaHCO
3
can only produce CO
2
on heating of the given mixture as per following balanced equation:
2NaHCO
3
⟶Na
2
CO
3
+H
2
O+CO
2
This equation reveals that 22.4 L CO
2
is produced from 2 moles NaHCO
3
.
So 1.12 L of CO
2
can be obtained from
22.4
168
×1.12=8.4 g of NaHCO
3
.
So the weight of Na
2
CO
3
in the mixture of 19 g before heating was =19−8.4=10.6 g