What will be the volume of co2 at ntp
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What will be the volume of co2 liberated at ntp by heating 20 gram of 90% pure limestone csco 3?
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Answer
Given ,
Mass of Mixture = 20g. [It contains impurities]
Purity of Limestone ( CaCO3 ) = 90%
Then , Amount of Limestone present in the mixture =
Then , Amount of Limestone present in the mixture =90/100 * 20 = 18g.
Now,
1 mole of CaCO3 = 40+12+3*16 [Ca=40;C=12;O=16]
= 100g
Now , No . of. moles in 18g CaCO3 = 18/100.
= 0.18 moles.
CaCO3 => CaO + CO2
If 1 mole CaCO3 gives 1 mole CO2
1 mole CaCO3 gives 1 mole CO2 Then , 0.18 moles of CaCO3 gives 0.18moles CO2
Since , at S.T.P Vol of Any Gas = 22.4 l or 22.4 dm^3
So , it contains 0.18 × 22.4 = 4.032 l or dm^3 of CO2.
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