This is the balanced chemical equation for the reaction between nickel hydroxide (Ni(OH)2) and sulfuric acid (H2SO4) to produce nickel sulfate (NiSO4) and water (H2O).

Ni(OH)2 + H2SO4 -> NiSO4 + 2H2O

This equation shows that one mole of nickel hydroxide reacts with one mole of sulfuric acid to yield one mole of nickel sulfate and two moles of water.