Запишите уравнения реакций замещения
1) Al + .... -> Al2(SO4)3 + .....
2) ....+ HBr -> MgBr2 + ....
3) CuCl2 + Cr -> CrCl3 + ....
4) Fe2O3 + Mg ->....+ ....
Запишите уравнения реакций замещения
1) Al + .... -> Al2(SO4)3 + .....
2) ....+ HBr -> MgBr2 + ....
3) CuCl2 + Cr -> CrCl3 + ....
4) Fe2O3 + Mg ->....+ ....
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Answers & Comments
1) 2Al + 3H2SO4 = Al2(SO4)3 + 3H2↑
2) MgCl2 + 2HBr = MgBr2 + 2HCl
3) 3CuCl2 + 2Cr = 2CrCl3 + 3Cu
4) Fe2O3+Mg = 3MgO + 2Fe