* Nickel(III) ion: Nickel in its +3 oxidation state is represented as Ni³⁺.
* Phosphate ion: The phosphate ion is PO₄³⁻.
Balancing the charges:
To create a neutral compound, the positive and negative charges must balance. Since both ions have a magnitude of 3, we need one of each:
* 1 Ni³⁺ + 1 PO₄³⁻ = NiPO₄
Therefore, the chemical formula for nickel(III) phosphate is NiPO₄.