m g 660,7 g
CaO + H2O --> Ca(OH)2
56 74
=> m = 56x660,7/74 = 500 g CaO
m.pur g 500g
CaCO3 --toC--> CaO + CO2
100 56
=> m.pur = 100x500/56 = 892,86 g CaCO3 pur
90% .......................... 892,86g CaCO3 pur
100% ......................... m.impur = 992g calcar (CaCO3 impur)