приведите по 2 малекулярных уравнения реакций для следующих ионных

1)3Сa степень окисления 2+ + 2Po4 с.о.3- =Сa3(PO4)2 ↓
2)Fe c.o 3+ + 3OH- = Fe(OH)3 ↓
3)2H+ + S2- = H2S ↑
4)H2SiO3 + 2OH = SiO3 c.o 2- + 2H2O
5)Fe (OH)3 + 3H+ = Fe c.o 3+ + 3H2O

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