Question 1

Electrolysis can be used to electroplate metals onto surfaces.

Accepted Answer

Electroplating involves using electrolysis to deposit a thin layer of metal onto a surface.

Question 2

A positive voltage in the standard reduction potential means that the half-reaction proceeds as a reduction when connected to the standard hydrogen electrode (SHE)because the SHE is serving as the anode .

Accepted Answer

A positive standard reduction potential indicates that the half-reaction is more likely to gain electrons and proceed as a reduction when paired with the SHE, which acts as the anode in this scenario.

Question 3

Galvanic corrosion occurs only when two different metals contact each other in the presence of an appropriate electrolyte.

Accepted Answer

Galvanic corrosion requires two dissimilar metals and an electrolyte to facilitate the electrochemical reaction that leads to corrosion.

Question 4

If a chemical species gains electrons in a redox reaction, the species is said to have undergone oxidation.

Accepted Answer

In a redox reaction, if a chemical species gains electrons, it is said to have undergone reduction, not oxidation.

Question 5

Which of the following species undergoes oxidation in the formation of iron (III)oxide?

Accepted Answer

Iron (Fe) undergoes oxidation as it loses electrons to form iron (III) oxide (Fe2O3).

Question 6

Consider the following reaction: Cu → Cu ²⁺+ 2e ^- Which of the following best describes the reaction?

Accepted Answer

The reaction involves the loss of electrons by copper (Cu), which is characteristic of an oxidation half-reaction.

Question 7

If an electrochemical half-reaction includes the production or consumption of a gas, the standard state is a pressure of 1 atm.

Accepted Answer

The standard state for gases in electrochemical reactions is defined as a pressure of 1 atm.

Question 8

In the context of electrolysis, if the electrodes are chemically inert materials that simply provide a path for electrons, the process is called active electrolysis.

Accepted Answer

In electrolysis, when electrodes are chemically inert and do not participate in the reaction, the process is called "inactive" or "passive" electrolysis, not "active" electrolysis.

Question 9

All dry cell batteries are rechargeable.

Accepted Answer

Not all dry cell batteries are rechargeable. Alkaline and zinc-carbon batteries, for example, are not designed to be recharged.

Question 10

Consider the following reaction: Na⁺+ e⁻→ Na Which of the following best describes the reaction?

Accepted Answer

The reaction is a reduction half-reaction because it involves the gain of electrons by Na⁺ ions.

Question 11

The species undergoing reduction is referred to as an oxidizing agent.

Accepted Answer

The species that undergoes reduction gains electrons and causes another species to lose electrons, thus acting as an oxidizing agent.

Question 12

A galvanic cell is an electrochemical cell in which a spontaneous chemical reaction can be used to generate an electrical current.

Accepted Answer

A galvanic cell, also known as a voltaic cell, uses a spontaneous redox reaction to convert chemical energy into electrical energy, generating an electric current.

Question 13

Reduction occurs at the anode of a galvanic cell.

Accepted Answer

Reduction occurs at the cathode of a galvanic cell, while oxidation occurs at the anode.

Question 14

Which of the following species undergoes reduction in the formation of iron (III)oxide?

Accepted Answer

The answer of Which of the following species undergoes reduction...

Question 15

The rusting of automobile bodies is an example of uniform corrosion.

Accepted Answer

Uniform corrosion occurs evenly across the surface of a material, and rusting of automobile bodies typically happens uniformly when exposed to the environment.

Question 16

Secondary cells are rechargeable.

Accepted Answer

Secondary cells, also known as rechargeable batteries, can be recharged and used multiple times by reversing the chemical reaction through the application of electrical energy.

Question 17

The standard hydrogen electrode (SHE)involves a platinum wire or foil that is the conducting source of electrons; hydrogen gas is bubbled over the electrode at a pressure of 1 atm, and the electrolyte solution is 1 M HCl(aq).

Accepted Answer

The answer of The standard hydrogen electrode (SHE)involves a platinum...

Question 18

Electrolysis involves using an external electric current to drive an electrochemical reaction in a nonspontaneous direction.

Accepted Answer

Electrolysis is a process that uses an external electric current to drive a chemical reaction that would not occur spontaneously, typically involving the decomposition of compounds.

Question 19

The Nernst equation describes the pH required for a spontaneous electrolytic reaction.

Accepted Answer

The Nernst equation relates the reduction potential of a half-cell in an electrochemical cell to the standard electrode potential, temperature, and activities (or concentrations) of the chemical species involved, not specifically to the pH for spontaneity.

Question 20

Identify a true statement about a redox reaction.

Accepted Answer

A redox reaction involves the transfer of electrons between two species, where one species is oxidized and the other is reduced.

Quiz 13: Electrochemistry

Electrolysis can be used to electroplate metals onto surfaces.

A positive voltage in the standard reduction potential means that the half-reaction proceeds as a reduction when connected to the standard hydrogen electrode (SHE)because the SHE is serving as the anode .

Galvanic corrosion occurs only when two different metals contact each other in the presence of an appropriate electrolyte.

If a chemical species gains electrons in a redox reaction, the species is said to have undergone oxidation.

Which of the following species undergoes oxidation in the formation of iron (III) oxide?

Consider the following reaction: Cu → Cu ²⁺+ 2e ^- Which of the following best describes the reaction?

If an electrochemical half-reaction includes the production or consumption of a gas, the standard state is a pressure of 1 atm.

In the context of electrolysis, if the electrodes are chemically inert materials that simply provide a path for electrons, the process is called active electrolysis.

All dry cell batteries are rechargeable.

Consider the following reaction: Na⁺+ e⁻→ Na Which of the following best describes the reaction?

The species undergoing reduction is referred to as an oxidizing agent.

A galvanic cell is an electrochemical cell in which a spontaneous chemical reaction can be used to generate an electrical current.

Reduction occurs at the anode of a galvanic cell.

Which of the following species undergoes reduction in the formation of iron (III) oxide?

The rusting of automobile bodies is an example of uniform corrosion.

Secondary cells are rechargeable.

The standard hydrogen electrode (SHE)involves a platinum wire or foil that is the conducting source of electrons; hydrogen gas is bubbled over the electrode at a pressure of 1 atm, and the electrolyte solution is 1 M HCl(aq).

Electrolysis involves using an external electric current to drive an electrochemical reaction in a nonspontaneous direction.

The Nernst equation describes the pH required for a spontaneous electrolytic reaction.

Identify a true statement about a redox reaction.

Quiz 13: Electrochemistry

Electrolysis can be used to electroplate metals onto surfaces.

A positive voltage in the standard reduction potential means that the half-reaction proceeds as a reduction when connected to the standard hydrogen electrode (SHE)because the SHE is serving as the anode .

Galvanic corrosion occurs only when two different metals contact each other in the presence of an appropriate electrolyte.

If a chemical species gains electrons in a redox reaction, the species is said to have undergone oxidation.

Which of the following species undergoes oxidation in the formation of iron (III) oxide?

Consider the following reaction: Cu → Cu 2+ + 2e - Which of the following best describes the reaction?

If an electrochemical half-reaction includes the production or consumption of a gas, the standard state is a pressure of 1 atm.

In the context of electrolysis, if the electrodes are chemically inert materials that simply provide a path for electrons, the process is called active electrolysis.

All dry cell batteries are rechargeable.

Consider the following reaction: Na++ e − → Na Which of the following best describes the reaction?

The species undergoing reduction is referred to as an oxidizing agent.

A galvanic cell is an electrochemical cell in which a spontaneous chemical reaction can be used to generate an electrical current.

Reduction occurs at the anode of a galvanic cell.

Which of the following species undergoes reduction in the formation of iron (III) oxide?

The rusting of automobile bodies is an example of uniform corrosion.

Secondary cells are rechargeable.

The standard hydrogen electrode (SHE)involves a platinum wire or foil that is the conducting source of electrons; hydrogen gas is bubbled over the electrode at a pressure of 1 atm, and the electrolyte solution is 1 M HCl(aq).

Electrolysis involves using an external electric current to drive an electrochemical reaction in a nonspontaneous direction.

The Nernst equation describes the pH required for a spontaneous electrolytic reaction.

Identify a true statement about a redox reaction.

Consider the following reaction: Cu → Cu ²⁺+ 2e ^- Which of the following best describes the reaction?

Consider the following reaction: Na⁺+ e⁻→ Na Which of the following best describes the reaction?