Unit 11Redox

Front

In Mg2+, the number of electrons is ___ .

Back

10

Front

What charge will an Oxygen ion have?

Back

-2

Front

In the reaction 2Ca(s) + O2(g) --> 2CaO(s), calcium is __________

Back

Oxidized

Front

What is exchanged in redox reactions?

Back

electrons

Front

What substance is oxidized in the following reaction? 4Fe + 3O2 --> 2Fe2O3

Back

Iron

Front

Define oxidation in terms of electron transfer.

Back

Oxidation is the loss of electrons by a substance.

Front

Define reduction in terms of electron transfer.

Back

Reduction is the gain of electrons by a substance.

Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction involving the transfer of electrons between two species.

Front

What is the oxidation state of oxygen in most compounds?

Back

-2

Front

What is the oxidation state of hydrogen in most compounds?

Back

+1