Sn (s) + 2 H2SO4 (aq) → SnSO4 (aq) + 2 H2O (l) + SO2 (g)
This is because the hot concentrated acid generally act as oxidizing agents, acid when dilute acids act as usual. So when the hot concentrated acid reacts with zinc, tin, and copper, it will produce a salt, water and sulfur dioxide, when the dilute acid which react with metals such as zinc will produce salt and hydrogen.So magnesium, aluminum, and silver. is a metal with a potential positive standard can dissolve well only on the nature oxidizing acid such as nitric acid (HNO3) Electrochemical Series: Li, K, Na, Mg, Al, Mn, Zn, Cr, Fe, Cd, Co, Ni, Sn , Pb, H, Cu, Hg, Ag, Pd, Au, Pt. Metals are located to the left of hydrogen (H) has a negative electrochemical potential, while the right of the hydrogen has a positive electrode potential.