Question

What mass of Na2CO3 will be obtained on heating 168g of NaHCO3 to 300 degree Celsius

Answer 1

Answer:

We can write the equation as 2NaHCO3 -> Na2CO3 + CO2 +H2O .

The molecular mass of NahCO3 will be 84*2 = 168g.

Thus we know that 22400 ml CO2 is given by - 168 g of NaHCO3.

Hence, we can say that 300 ml CO2 is given by - 168 x 300 /22400 = 2.25g.

Hence, the Percentage purity of the sample will be = 2.25 x 100 /2.5 .

On calculating we will get the purity percentage as 90%.

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