Diluted sulfuric acid does not possess oxidizing properties, which means it reacts with metals to hydrogen in the range of metal activity. It reacts with basic and amphoteric oxides, bases and amphoteric hydroxides, with salts to form a weak electrolyte.
1.3H2SO4 + 2Al = Al2 (SO4) 3 + 3H2
2.Al2O3 + 3H2SO4 = Al2 (SO4) 3 + 3H2O
3.2Al (OH) 3 + H2SO4 = Al2 (SO4) 3 + 6H2O
4. The reaction does not proceed, because weak electrolyte is not formed
5. The reaction does not proceed, because Ag is a weak metal
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