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2) Ca(OH)2 +temp--> CaO + H2O
a potem CaO + C = Ca + CO
3) Ca + Cl2 = CaCl2
4) CaO + 2HCl = CaCl2 + H2O
5) Ca(OH)2 + 2HCl = CaCl2 + 2H2O
6) CaCl2 + K2SO4 = CaSO4 + 2KCl