4.7 Oxidation and Reduction (AP Chemistry)

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 the oxidation number of an element in its elemental form?

Back

The oxidation number of an element in its elemental form is always 0.

Front

What is the oxidation number of oxygen in most compounds?

Back

The oxidation number of oxygen in most compounds is -2.

Front

What is the oxidation number of hydrogen in most compounds?

Back

The oxidation number of hydrogen in most compounds is +1.

Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction that involves the transfer of electrons between two species, resulting in oxidation and reduction.

Front

What is the role of a reducing agent?

Back

A reducing agent is a substance that donates electrons in a redox reaction, causing another substance to be reduced.

Front

What is the role of an oxidizing agent?

Back

An oxidizing agent is a substance that accepts electrons in a redox reaction, causing another substance to be oxidized.

Front

How do you determine the oxidation state of an element in a compound?

Back

To determine the oxidation state, use the rules for assigning oxidation numbers based on the known oxidation states of other elements in the compound.

Front

What happens to the oxidation state of an element during oxidation?

Back

During oxidation, the oxidation state of an element increases.