Question

Identify the formula of the compound iron (III) phosphide.

Answer 1

Answer: The chemical formula of the compound is $FeP$

Explanation:

Iron (III) phosphide is a compound which is formed by the combination of iron ion $(Fe^{3+})$ and phosphide ion $(P^{3-})$

The oxidation state of iron in the compound is +3 and the oxidation state of phosphorus in the compound is -3.

Thus, by criss-cross method, the oxidation states of the opposite ions becomes the subscipt of the other atom that represents the number of individual atoms in a compound. So, the chemical formula of iron (III) phosphide becomes $FeP$

Hence, the chemical formula of the compound is $FeP$

Answer 2

The charges of iron and phosphide has to be known to get the formula of the compound iron (III) phosphide. Fe3+ is the formula of iron with charge here and P3− is the formula and charge of phosphide. The formula of the compound is FeP. I hope that this is the answer that has actually helped you.