Chem122A Review Session Exam 2

Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction in which the oxidation states of one or more species are changed, involving the transfer of electrons between them.

Front

What does it mean for a species to be reduced in a redox reaction?

Back

A species is reduced when it gains electrons, resulting in a decrease in its oxidation number.

Front

What is the function of a salt bridge in a galvanic cell?

Back

The salt bridge maintains charge neutrality by allowing the migration of ions between the two half-cells.

Front

How does adding a strong acid affect the solubility of a weak base in water?

Back

Adding a strong acid increases the solubility of a weak base by shifting the equilibrium towards the formation of the conjugate acid.

Front

What is a buffer solution?

Back

A buffer solution is a solution that resists changes in pH upon the addition of small amounts of acid or base, typically composed of a weak acid and its conjugate base.

Front

When is a buffer solution most effective?

Back

A buffer solution is most effective when it contains equal concentrations of a weak acid and its conjugate base.

Front

What is the flow of electrons in a voltaic cell?

Back

In a voltaic cell, electrons flow from the anode to the cathode through the external circuit.

Front

What is oxidation in a redox reaction?

Back

Oxidation is the process in which a species loses electrons, resulting in an increase in its oxidation number.

Front

What is the role of the anode in a galvanic cell?

Back

The anode is the electrode where oxidation occurs, and it is the source of electrons for the external circuit.

Front

What is the role of the cathode in a galvanic cell?

Back

The cathode is the electrode where reduction occurs, and it is where electrons are accepted from the external circuit.