Question

Calculati volumul de CO2 in conditii normale rezultat prin reactia a 150g CaCO2 de puritate 60%. ( REACTIA - CaCO2 + 2HCl = CaCl2 + CO2 + H2O )

Answer 1

-calculez masa CaCO3 pur
p/100= m,pur/m,impur
60/100= m,pur/150---> m,pur=90g CaCO3pur
miu,CaCO3=(4OgCa+12gC+3x16gO)/mmol= 100g/mol
V,m=22,4l/mol
-din ecuatia reactiei deduc V,CO2
1mol    .............................1mol
CaCO3+2HCl----> CaCl2 +CO2 + H2o
100g.................................22,4l
90..........................................V= 90x22,4/100=   calculeaza !!!!