Question

HCl+Al2O3= HCl+NiO2= HCl+MgO=

Answer 1

6HCl+Al2O3=2AlCl3+3H20
4HCl+NiO2=NiCl4+2H20
2HCl+MgO=MgCl2+H2O

Answer 2

The chemical reactions you've mentioned involve the combination of hydrochloric acid (HCl) with different metal oxides. Here are the balanced chemical equations for each reaction:

1. HCl + Al2O3 → AlCl3 + H2O Hydrochloric acid reacts with aluminum oxide to form aluminum chloride and water.

2. HCl + NiO2 → NiCl2 + H2O Hydrochloric acid reacts with nickel(IV) oxide to produce nickel(II) chloride and water.

3. HCl + MgO → MgCl2 + H2O Hydrochloric acid reacts with magnesium oxide to yield magnesium chloride and water.

Please note that the formulas for nickel oxide and magnesium oxide have been corrected in the equations above. Nickel oxide is NiO, while magnesium oxide is MgO.