Question

what is the correct name for the compound fe₂o₃? iron (ii) oxide iron oxide iron (iii) oxide iron trioxide

Explanation:

• In naming ionic compounds with transition metals (like iron), we need to indicate the oxidation state of the metal.
• Oxygen has an oxidation state of - 2. In \(Fe_2O_3\), let the oxidation state of \(Fe\) be \(x\). Using the formula for charge neutrality in a compound (\(2x+3\times(- 2)=0\)).
• Solving \(2x - 6 = 0\) gives \(x = + 3\).
• The Roman numeral in parentheses after the metal name represents its oxidation state. So, for \(Fe\) with an oxidation state of \(+3\), we use (III).

Answer:

Iron (III) oxide