5H2SO4(конц) + 4Mg =4MgSO4 + 4H2O +H2S;
S(+6) + 8e = S(-2) |1
Mg(0) -2e = Mg(+2) |4
4H2SO4(конц) + 3Mg =3MgSO4 + 4H2O+ S
S(+6) + 6e = S(-2) |1
Mg(0) -2e = Mg(+2) |3
5H2SO4(конц) + 4Mg =4MgSO4 + 4H2O +H2S;
S(+6) + 8e = S(-2) |1
Mg(0) -2e = Mg(+2) |4
4H2SO4(конц) + 3Mg =3MgSO4 + 4H2O+ S
S(+6) + 6e = S(-2) |1
Mg(0) -2e = Mg(+2) |3