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PCAT Review Questions - Pharmacy College

Category - Chemistry

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Which of the following is the correct molecular formula for magnesium phosphate?

MgPO₄
Mg₃(PO₄)₂
Mg(PO₄)₂
MgP
MgP₂

Explanation

Answer: Mg₃(PO₄)₂

Phosphate is a polyatomic anion with the molecular formula PO₄^3-, and magnesium typically takes an oxidation state of +2. The simplest way to balance these charges gives the correct molecular formula, Mg₃(PO₄)₂.

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