Question

Cat oxid de calciu cu 10% impuritati se obtin in urma descompunerii a 1,5 tone calcar de puritate 95%?

Answer 1

-calculez masa de calcar pur
p= m,px100/m,i---> m,p= 1500x95/100=1425kg CaCO3
-calculez masa de CaO care se obtine prin descompunere
1Kmol................1kmol
CaCO3 ------> CaO + CO2
100kg.............56kg
1425kg............m=798kg CaO pur
-calculez masa de CaO impur, cu p= 90%
m,i= 798x100/90=886,7 kg