AP Chemistry Electrochemistry Review

Front

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

Back

The oxidation number increases as electrons are lost.

Front

In the reaction Sn⁺² + 2Fe⁺³ → Sn⁺⁴ + 2Fe⁺², which species is the reducing agent?

Back

Sn⁺² is the reducing agent.

Front

What are examples of reduction?

Back

Reduction involves the gain of electrons, which can be represented by reactions I and III.

Front

How does conductivity change with a decrease in concentration?

Back

Conductivity always decreases with a decrease in concentration.

Front

In an electrochemical cell, which direction do electrons flow?

Back

Electrons flow from the anode to the cathode.

Front

What is oxidation in terms of electron transfer?

Back

Oxidation is the loss of electrons.

Front

What is reduction in terms of electron transfer?

Back

Reduction is the gain of electrons.

Front

Define a reducing agent.

Back

A reducing agent is a substance that donates electrons in a chemical reaction and is oxidized in the process.

Front

Define an oxidizing agent.

Back

An oxidizing agent is a substance that accepts electrons in a chemical reaction and is reduced in the process.

Front

What is the relationship between oxidation states and redox reactions?

Back

In redox reactions, the oxidation states of elements change as electrons are transferred.