2Fe+O=2FeO;
2Al+3Cl^2=2AlCl^3; Ca+2HCl=CaCl^2+H^2; CuSO^4+2NaOH=Cu(OH)^2+Na^2SO^4
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2) 2Ал+3хлор->2АлСl3
3) Са+ 2HCl= Сахлор2 + Н2
4)Cuso4 + 2Naoh= Cu (oh)2+ Na2So4
2Fe+O=2FeO;
2Al+3Cl^2=2AlCl^3; Ca+2HCl=CaCl^2+H^2; CuSO^4+2NaOH=Cu(OH)^2+Na^2SO^4