Question

question 2. which of the following correctly identifies the formula of the ionic compound formed between the ions: fe³⁺ and cl⁻?
∘ fecl
∘ fe₂cl₃
∘ fecl₃
∘ fe₂cl

Explanation:

Step1: Recall Ionic Compound Formula Rule

Ionic compounds are neutral, so the total positive charge equals total negative charge. For ions \(\text{Fe}^{3+}\) (charge +3) and \(\text{Cl}^-\) (charge -1), we find the ratio of ions to balance charges.

Step2: Calculate Ion Ratio

Let the number of \(\text{Fe}^{3+}\) be \(x\) and \(\text{Cl}^-\) be \(y\). Then \(3x = 1y\) (to balance charge). The smallest whole - number solution is \(x = 1\), \(y = 3\) (since \(3\times1=1\times3\)). So the formula is \(\text{FeCl}_3\).

Answer:

\(\text{FeCl}_3\) (the third option: \(\boldsymbol{\text{FeCl}_3}\))