Виконати ланцюги перетворення:
1. K---KOH---K2CO3---BaCO3---BaO
2. Ca---Ca(OH)2---CaCl2---CaCO3---CaO
1. K---KOH---K2CO3---BaCO3---BaO
2. Ca---Ca(OH)2---CaCl2---CaCO3---CaO
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Ответ:
1)2K + 2H2O = 2KOH + H2
2KOH + CO2 = K2CO3 + H2O
K2CO3 + BaCl2 = BaCO3 + 2KCl
BaCO3 = BaO + CO2
2)2Ca + 2H2O = Ca(OH)2 + H2
Ca(OH)2 + 2HCl = CaCl2 + 2H2O
CaCl2 + Na2CO3 = CaCO3 + 2NaCl
CaCO3 = CaO + H2O