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The hydrated salt Na 2 CO 3 . x H 2 O undergoes 46% loss in mass on heating and becomes anhydrous.then wat is the value of 'X'?

The hydrated salt Na2CO3.xH2O undergoes 46% loss in mass on heating and becomes anhydrous.then wat is the value of 'X'?

Grade:11

1 Answers

Fawz Naim
37 Points
11 years ago

The hydrated sodium carbonate is converted into anhydrous sodium carbonate on heating which means that X molecoles of water are separated completely. Therefore the loss in weight is equal to the X molecules of water.

46% of the weight of hydrated sodium carbonate=18X molecules of water

the molecular weight of sodium carbonate is 106 and that of water is 18

therefore 46%*(106+18X)=18X

find the value of X

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