Ch. 18: Redox Review

Front

What is oxidation?

Back

Oxidation is the loss of electrons during a chemical reaction.

Front

What is reduction?

Back

Reduction is the gain of electrons during a chemical reaction.

Front

In the reaction 2 CaO → 2 Ca + O2, is calcium oxidized or reduced?

Back

Calcium is reduced.

Front

What element is being oxidized in the reaction 2 CaO → 2 Ca + O2?

Back

Oxygen (O) is being oxidized.

Front

What is a half-reaction?

Back

A half-reaction is an equation that shows either the oxidation or reduction process separately.

Front

Which half-reaction represents oxidation?

Back

Fe → Fe²⁺ + 2e⁻ represents oxidation.

Front

Which half-reaction represents reduction?

Back

Pb⁴⁺ + 2e⁻ → Pb²⁺ represents reduction.

Front

What is the oxidation state of an element?

Back

The oxidation state is a measure of the degree of oxidation of an atom in a substance.

Front

What is the role of a reducing agent?

Back

A reducing agent donates electrons and is oxidized in the process.

Front

What is the role of an oxidizing agent?

Back

An oxidizing agent accepts electrons and is reduced in the process.