Oxidation Numbers and Redox Reactions

Front

What is a reduction reaction?

Back

A reduction reaction is a chemical process in which an atom or molecule gains one or more 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

Define oxidation in terms of electron transfer.

Back

Oxidation is the process in which an atom or molecule loses one or more electrons, resulting in an increase 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, resulting in changes in oxidation states.

Front

What is the oxidation number of chlorine in NaCl?

Back

The oxidation number of chlorine in NaCl is -1.

Front

What is the oxidation number of sulfur in H2SO4?

Back

The oxidation number of sulfur in H2SO4 is +6.

Front

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

Back

The oxidation number of an element that is oxidized increases.

Front

What is the oxidation number of nitrogen in NH3?

Back

The oxidation number of nitrogen in NH3 is -3.