ćw. w zapisywaniu reakcji
K' +HNO₃->
Fe'' + H₃PO₄->
Ca''+H₂CO₃->
2K' +2HNO₃-> 2KNO3 + H2
3Fe'' + 2H₃PO₄->Fe3(PO4)2 + 3H2
Ca''+H₂CO₃-> CaCO3 + H2
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2K' +2HNO₃-> 2KNO3 + H2
3Fe'' + 2H₃PO₄->Fe3(PO4)2 + 3H2
Ca''+H₂CO₃-> CaCO3 + H2