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Ca(OH)2 + H2SO4 --->CaSO4 + 2H2O
74g Ca(OH)2 - 136g CaSO4
10g - X
X=18,4g CaSO4 powstanie
2.
Al2O3 + 3H2SO4--->Al2(SO4)3 + 3H2O
102g Al2O3 - 342g Al2(SO4)3
10g - X
X=33,5g Al2(SO4)3 powstaną