Redox Reactions Review

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

Define oxidation in terms of electron transfer.

Back

Oxidation is the process in which a substance loses electrons, leading to an increase in its oxidation state.

Front

Define reduction in terms of electron transfer.

Back

Reduction is the process in which a substance gains electrons, resulting in a decrease in its oxidation state.

Front

What is the oxidation number of hydrogen in most compounds?

Back

+1, except when bonded to metals in metal hydrides where it is -1.

Front

What is the oxidation number of oxygen in most compounds?

Back

-2, except in peroxides where it is -1.

Front

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

Back

Assign oxidation numbers based on a set of rules, including the known oxidation states of common elements and the overall charge of the compound.

Front

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

Back

The oxidation number increases.

Front

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

Back

The oxidation number decreases.

Front

In the reaction SO4^2- to SO4, what type of reaction is this?

Back

Oxidation, because the oxidation state of sulfur increases from -2 to +6.

Front

What is the oxidation number of carbon in NaHCO3?

Back

+4.