Question 1

When aqueous brine is electrolyzed, the products are:

Accepted Answer

Electrolysis of aqueous brine (NaCl solution) produces chlorine gas at the anode, hydrogen gas at the cathode, and sodium hydroxide in the solution.

Question 2

The Downs cell is used in the electrolytic manufacture of

Accepted Answer

The Downs cell is specifically designed for the electrolytic production of sodium metal and chlorine gas from molten sodium chloride.

Question 3

Iron objects, such as storage tanks and underground pipelines, can be protected from corrosion, by connecting them to a piece of

Accepted Answer

Zinc is used to protect iron objects from corrosion through a process called galvanic protection, where zinc acts as a sacrificial anode and corrodes instead of the iron.

Question 4

Steel objects that are exposed to weather can be protected from corrosion by a coating of ________, a process called galvanizing.

Accepted Answer

Zinc is used in the galvanizing process to protect steel from corrosion by forming a protective barrier and acting as a sacrificial anode.

Question 5

The cathode in a galvanic cell has a ________ polarity.

Accepted Answer

The answer of The cathode in a galvanic cell has...

Question 6

The anode in a galvanic cell has a ________ polarity.

Accepted Answer

The answer of The anode in a galvanic cell has...

Question 7

The salt bridge in a galvanic cell allows the solutions in the half-cells to remain electrically neutral by allowing the transfer of ________ between the half-cells.

Accepted Answer

The answer of The salt bridge in a galvanic cell...

Question 8

The Faraday constant is equal to the ________ on 1 mole of electrons.

Accepted Answer

The answer of The Faraday constant is equal to the...

Question 9

What is the purpose of an electrolyte in an electrochemical reaction?

Accepted Answer

The answer of What is the purpose of an electrolyte...

Question 10

Given the following notation for an electrochemical cellPt(s)| H₂(g)| H⁺(aq)|| Ag⁺(aq)| Ag(s),what is the balanced overall (net)cell reaction?

Accepted Answer

The answer of Given the following notation for an electrochemical...

Question 11

Sketch a galvanic cell with metallic zinc (E° = -0.76 V)and metallic tin (E° = -0.14 V)electrodes. Make sure to label the anode and cathode, write the two half-reactions, and suggest a good electrolyte.

Accepted Answer

The answer of Sketch a galvanic cell with metallic zinc...

Question 12

Consider an electrochemical cell based on the following cell diagram: In | In⁺(aq)|| Br^-(aq),Br₂(g)| Pt If the standard cell potential is 1.21 V, what is the standard reduction potential for Indium (In)?

Accepted Answer

The answer of Consider an electrochemical cell based on the...

Question 13

Using these metal ion/metal standard reduction potentials A galvanic cell is composed of these two half-cells: Cr³⁺(aq)| Cr(s) Cu²⁺(aq)| Cu(s) What is the standard reduction potential for the cell reaction of this galvanic cell?

Accepted Answer

The answer of Using these metal ion/metal standard reduction potentials...

Question 14

If the measured voltage of the cell Zn(s)| Zn²⁺(aq)|| Ag⁺(aq)| Ag(s)is 1.37 V when the concentration of Zn²⁺ ion is 0.010 M, what is the Ag⁺ ion concentration?

Accepted Answer

The answer of If the measured voltage of the cell...

Question 15

Consider the following reaction: 2Fe²⁺(aq)+ Cu²⁺ → 2Fe³⁺(aq)+ Cu. When the reaction comes to equilibrium, what is the cell voltage?

Accepted Answer

The answer of Consider the following reaction: 2Fe²⁺(aq)+ Cu²⁺ →...

Question 16

Consider the following reaction: 2Cu⁺(aq)+ Ni²⁺ → 2Cu²⁺(aq)+ Ni(s). When the reaction comes to equilibrium, what is the cell voltage?

Accepted Answer

The answer of Consider the following reaction: 2Cu⁺(aq)+ Ni²⁺ →...

Question 17

In the lead storage battery, the electrolyte is a solution of ________.

Accepted Answer

The answer of In the lead storage battery, the electrolyte...

Question 18

In lithium ion batteries, lithium ions are able to slip between layers in certain crystals, in a process called ________.

Accepted Answer

The answer of In lithium ion batteries, lithium ions are...

Question 19

Semiconductor material is ________ with another element, to increase the material's ability to conduct electricity.

Accepted Answer

The answer of Semiconductor material is ________ with another element,...

Question 20

In the zinc-carbon dry cell, the electrode at which oxidation takes place has a ________ charge.

Accepted Answer

The answer of In the zinc-carbon dry cell, the electrode...

Quiz 20: Electrochemistry