CaCO3 + 2HCl -> CaCl2 + CO2 + H2O (1)
nHCl=0,2(mol)
Từ 1:
nCaCO3=\(\dfrac{1}{2}\)nHCl=0,1(mol)
mCaCO3=100.0,1=10(g)
b;
Ca(OH)2 + 2HCl -> CaCl2 + 2H2O (2)
Từ 2:
nCa(OH)2=\(\dfrac{1}{2}\)nHCl=0,1(mol)
mCa(OH)2=74.0,1=7,4(g)
mdd Ca(OH)2=7,4:5%=148(g)