Question

DAU COROANA, 20 puncte
scrieti ecuatiile transformarilor
Ca⇒CaO⇒CaCl2⇒Ca(OH)2⇒CaCO3⇒CaO⇒Ca(OH)2

Answer 1

2Ca + O2=2CaO

CaO + 2HCl = CaCl2 + H2O

CaCl2 + Cu (OH )2 =Ca(OH )2 +CuCl2

Ca(OH )2 + CO2=CaCO3  + H2O

CaCO3 = CaO + CO2

CaO +H2O =Ca(OH) 2