2gm of a mixture of na2co3 and nahco3 on heating to a constant weight gave 224ml of co2 stp. Calculate the percentage of na2co3 in the mixture?

Answer 1

Neat, you heated it to zero celcius to get gas.

YOu got .224/24 moles CO2.
in the 2g Na2CO3, you had available 2/molmassNa2CO3 moles of CO2.
The remainder of the moles of CO2 came from the bicarbonate. Calculate the moles of NaHCO3.
Now convert the mass of NaHCO3.
Knowing both original masses, you can easily determine the percent you need.

Answer 2

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Answer 3

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Answer 4

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Answer 5

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