The reaction between 15g of marbel and nitric acid is given by the following equation:
CaCO3 + 2HNO3 -> Ca(NO3)2 + H2O + CO2
Calculate:
(a) the mass of anhydrous calcium nitrate formed,
(b) the volume of carbon dioxide evolved at STP.
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Answer:
Atomic mass of CaCO3=(40+12+48)g
=100g
Mass of calcium nitrate=40+2(14+48)=40+124=164g
- (a)
From 100g CaCO3,164 g calcium nitrate formed
" 1g " 164/100g " " "
" 15g " 1.64×15g " " "
=24.6g calcium nitrate formed
- (b)
from 100g marbel 22.4L Carbon dioxide evolved
from 15g marbel 22.4/100×15L Carbon dioxide evolved
=3.36L
This is your answer.Hope you understand.
Note: CaCO3 and marbel are same compound.
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