Question

1. what is the correct name for the compound indicated by the formula, fe₂s₃?

○ iron (iii) sulfide
○ iron sulfide
○ iron (ii) sulfide
○ iron (i) sulfide
clear all

Explanation:

Step1: Determine ion charges

In \( \text{Fe}_2\text{S}_3 \), sulfur (S) typically has a charge of \( -2 \). Let the charge of Fe be \( x \). Using charge balance: \( 2x + 3(-2) = 0 \).

Step2: Solve for Fe charge

Solve \( 2x - 6 = 0 \) → \( 2x = 6 \) → \( x = +3 \). So Fe has a \( +3 \) charge (iron(III)).

Step3: Name the compound

The compound is named by the cation (with charge in Roman numerals) and anion. So it's iron(III) sulfide.

Answer:

A. Iron (III) sulfide