Abiotic Oxidation of Fe²⁺ Requires Oxygen and Occurs Rapidly When

Question

Abiotic oxidation of Fe²⁺ requires oxygen and occurs rapidly when the pH is near 7.

Accepted Answer

Abiotic oxidation of Fe²⁺ requires oxygen and occurs rapidly when the pH is near 7. This is because oxygen reacts with Fe²⁺ to form Fe³⁺, which is more stable at neutral pH. This reaction occurs faster at pH 7 than at other pH values.