a) Ca -> CaO -> Ca(OH)2 -> CaSO4
b) 2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + H2SO4 = CaSO4 (стрелка вниз) +2H2O
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a) Ca -> CaO -> Ca(OH)2 -> CaSO4
b) 2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + H2SO4 = CaSO4 (стрелка вниз) +2H2O