Oxidation Reduction (Redox)

Front

What is oxidation in a chemical reaction?

Back

Oxidation is the process in which an atom, ion, or molecule loses electrons, resulting in an increase in oxidation state.

Front

What is reduction in a chemical reaction?

Back

Reduction is the process in which an atom, ion, or molecule gains electrons, resulting in a decrease in oxidation state.

Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction that involves the transfer of electrons between two species, where one is oxidized and the other is reduced.

Front

Identify the oxidizing agent in a redox reaction.

Back

The oxidizing agent is the substance that gains electrons and is reduced in the reaction.

Front

Identify the reducing agent in a redox reaction.

Back

The reducing agent is the substance that loses electrons and is oxidized in the reaction.

Front

What is the oxidation state of an element in its elemental form?

Back

The oxidation state of an element in its elemental form is zero.

Front

What happens to the oxidation state of zinc in the reaction Zn + H2O -> ZnO2 + H2?

Back

Zinc is oxidized, and its oxidation state increases from 0 to +2.

Front

Which type of reaction is NOT a redox reaction?

Back

Neutralisation is NOT a redox reaction; it involves the reaction of an acid and a base to form water and a salt.

Front

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

Back

Iron (Fe) is oxidized.

Front

In the reaction 2Ca + O2 -> 2CaO, what happens to calcium?

Back

Calcium is oxidized.