Răspuns:
miu,Ca(OH)2=74g/mol
miu,CaCO3=100g/mol
1kmol................................1kmol
CaCO3 + 2NaOH----> Ca(OH)2 +Na2CO3
100kg................................74kg
x............................................148kg
x= 200kg CaCO3 pur
p=m,px100/m,i---> m,i= 200x100/80kg=250kg CaCO3 impur
Explicație: