what is the oxidation number of P in Mg3(PO4)2

Question

Question

Answer 1

Answer #1

Here we have Mg²⁺ and (PO₄)^3-.

Here we can exclude Mg²⁺ from the equation as it is on its own

Oxygen has oxidation number of -2

Therefore the total oxidation number for O₄ becomes -2 x 4 = -8

Let the oxidation state of P be X

Therefore, X + (-8) = -3

Therefore, X = +5

Oxidation number of P in Mg₃(PO₄)₂ is +5

Answer 2

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