Redox Reactions

Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction in which electrons are transferred between substances, resulting in changes in oxidation states.

Front

What is an oxidizing agent?

Back

A substance that oxidizes another substance by accepting its electrons.

Front

What is a reducing agent?

Back

A substance that reduces another substance by donating its electrons.

Front

What happens to the oxidation number of an element that is oxidized?

Back

The oxidation number increases.

Front

What happens to the oxidation number of an element that is reduced?

Back

The oxidation number decreases.

Front

In the reaction 4Fe + 3O2 -> 2Fe2O3, which substance is oxidized?

Back

Iron (Fe) is oxidized.

Front

In the reaction Cl2 + 2e- -> 2Cl-, what type of reaction is this?

Back

This is a reduction reaction.

Front

What is the oxidation number of oxygen in most compounds?

Back

The oxidation number of oxygen is usually -2.

Front

What is the oxidation number of hydrogen in most compounds?

Back

The oxidation number of hydrogen is usually +1.

Front

What is the oxidation number of carbon in SrCO3?

Back

The oxidation number of carbon (C) in SrCO3 is +4.