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2Na + 2HCl ---> 2NaCl + H2 chlorek sodu
Ca + 2HCl ---> CaCl2 + H2 chlorek wapnia
2/
3 Ca + 2 H3PO4 ---> Ca3(PO4)2 + 3 H2 ortofosforan(V) wapnia
6 K + 2 H3PO4 ---> 2 K3PO4 + 3 H2 ortofosforan(V) potasu
2 AL + 2 H3PO4 ---> 2 ALPO4 + 3 H2 ortofosforan(V) glinu
3 Zn + 2 H3PO4 ---> Zn3(PO4)2 + 3 H2 ortofosforan(V) cynku