Ni2O3 + HCl ->

1. Identify reactants: Nickel(III) oxide (Ni2O3) and hydrochloric acid (HCl).
2. Recognize reaction type: Acid-base reaction (metal oxide + acid).
3. Predict products: Salt (Nickel(III) chloride) and water.
4. Write unbalanced equation: Ni2O3 + HCl -> NiCl3 + H2O.
5. Balance the equation: Ni2O3 + 6HCl -> 2NiCl3 + 3H2O.