Oxidation/Reduction

Front

What is oxidation in terms of electron transfer?

Back

Oxidation is the process in which an atom, ion, or molecule loses electrons.

Front

What is reduction in terms of electron transfer?

Back

Reduction is the process in which an atom, ion, or molecule gains electrons.

Front

Define oxidation number.

Back

The oxidation number is a value assigned to an element in a compound that represents the number of electrons lost or gained by that element.

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

Determine the oxidation number of chromium in CrO4^2-.

Back

6

Front

Determine the oxidation number of nitrogen in HNO3.

Back

+5

Front

During the process of reduction, what happens to electrons?

Back

Electrons are gained.

Front

Find the oxidation number of sulfur in S2O4^2-.

Back

+3

Front

What is the oxidation number of Br2?

Back

0