does a reaction occur when aqueous solutions of nickel to nitrate in aluminum Sophie are combined

Answer 1

No. The reason is because all reactants and products are soluble and electrolytes so they ionize. The reaction looks like this….

3Ni(NO₃)₂aq + Al₂(SO₄)₃aq =>3NiSO_4aq + 2Al(NO₃)₃aq

If you look at the complete ionic equation you will see that all the ions are the same on left and right side. They are all just spectators and no reaction has taken place.