Ca + 2H2O = Ca(OH)2 + H2↑.
Ca(OH)2 + FeCl2 = CaCl2 + Fe(OH)2↓.
CaCl2 + K2CO3 = 2KCl + CaCO3↓.
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Ca + 2H2O = Ca(OH)2 + H2↑.
Ca(OH)2 + FeCl2 = CaCl2 + Fe(OH)2↓.
CaCl2 + K2CO3 = 2KCl + CaCO3↓.
Удачи)