Question

what is the formula for iron (iii) chloride? fecl₂ fe₃cl fecl₃ fecl

Explanation:

Iron (III) chloride is an ionic compound. The Roman numeral (III) indicates that the iron ion has a charge of \(+3\) (\(Fe^{3+}\)). Chloride ion has a charge of \(-1\) (\(Cl^{-}\)). To form a neutral compound, the charges must balance. Using the criss - cross method (the magnitude of the charge of one ion becomes the subscript of the other ion), for \(Fe^{3+}\) and \(Cl^{-}\), we get \(FeCl_{3}\). \(FeCl_{2}\) has \(Fe^{2+}\) (Iron (II) chloride), \(Fe_{3}Cl\) and \(FeCl\) do not follow the charge - balancing rules for these ions.

Answer:

C. \(FeCl_{3}\)