Question

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.​

Answer 1

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.