When magnesium interacts with a sulfuric acid solution, what happens?

This means that we are given magnesium Mg, but the state of sulfuric acid (H2SO4) is not indicated, so we will compose 2 equations:
1) Concentrated sulfuric acid H2SO4 (conc.):
Mg + H2SO4 (conc.) = MgSO4 + H2S + H2O;
Now let’s equalize:
4Mg + 5H2SO4 (conc.) = 4MgSO4 + H2S + 4H2O;
Redox reaction.
2) Diluted sulfuric acid H2SO4 (dil.):
Mg + H2SO4 (dil.) = MgSO4 + H2;
Gas (hydrogen) is formed / evolved. A typical type of reaction for this equation: substitution reaction, displacement of H2.



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