Question

which answer best describes what is happening in the following redox reaction? 4fe + 3o₂ ⟶ 2fe₂o₃ this is combustion. this is neutralization. iron is oxidized to form rust. oxygen is oxidized to form rust.

Explanation:

1. Analyze each option:

• Option 1: Combustion usually involves a substance reacting with oxygen to produce heat and light, and often forms carbon - based products (like CO₂ and H₂O for hydrocarbon combustion). This reaction is the formation of rust, not typical combustion.
• Option 2: Neutralization is a reaction between an acid and a base to form salt and water. This reaction has no acid or base involved, so it's not neutralization.
• Option 3: In the reaction \(4Fe + 3O_2

ightarrow2Fe_2O_3\), iron (Fe) has an oxidation state of 0 in the reactants and +3 in \(Fe_2O_3\) (products). Oxidation is the loss of electrons (increase in oxidation state). So iron is oxidized, and this reaction is the formation of rust (\(Fe_2O_3\) is rust).

• Option 4: Oxygen (O) has an oxidation state of 0 in \(O_2\) and - 2 in \(Fe_2O_3\). A decrease in oxidation state means reduction, not oxidation. So oxygen is reduced, not oxidized.

Answer:

Iron is oxidized to form rust.