Electrochemistry

Question 1

Electrochemistry

Answer 1

the branch of chemistry that deals with electricity-related applications of oxidation reduction reactions

Question 2

Half Cell

Answer 2

A single electrode immersed in a solution (electrolyte) of its ions

Question 3

Electrode

Answer 3

A conductor used to establish electrical contact with a non-metallic part of a circuit, such as an electrolyte

Question 4

Anode

Answer 4

electrode where oxidation occurs

Question 5

Cathode

Answer 5

electrode where reduction occurs

Question 6

Voltaic Cells

Answer 6

use spontaneous oxidation-reduction reactions to convert chemical energy to electrical energy

Question 7

Zinc Carbon Dry Cells

Answer 7

batteries such as those used in flashlights, cells consist of a zinc container, which serves as an anode, filled with a moist paste of MnO2, carbon black, NH4CL, and ZnCl2.

Question 8

Alkaline Batteries

Answer 8

batteries found in a portable compact, disc player, or other small electronic device are frequently alkaline dry cells. Cells do not have a carbon rod cathode, as in the zinc-carbon cell.

Question 9

Mercury Batteries

Answer 9

tiny batteries found in hearing aids, calculators, and camera flashes. The anode half-reaction is identical to that found in the alkaline dry cell. However, the cathode, or reduction, half-reaction is different.

Question 10

Corrosion

Answer 10

Is the loss of metal resulting from an oxidation-reduction reaction of the metal with substances in the environment

Question 11

Cathode Protection

Answer 11

Zinc is more easily oxidized than iron so it will react before the iron is oxidized

Question 12

Sacrificial Anode

Answer 12

When galvanizing metal the more easily oxidized metal is used

Question 13

Electrical potential

Answer 13

A measure of a cell’s ability to produce electrical current

Question 14

Reduction Potential

Answer 14

the tendency of a given half reduction to occur as a reduction

Question 15

Cell potential

Answer 15

the difference between the reduction potentials of the two half cells

Question 16

electrolytic cell

Answer 16

if electrolytic energy is required to produce a redox reaction and bring about a chemical change in an electrochemical cell

Question 17

Electroplating

Answer 17

an electrolytic process in which a metal ion is reduced and a solid metal is deposited on the surface

Question 18

electrolysis

Answer 18

the process of passing current through a cell for which the cell potential is negative and causing an oxidation-reduction reaction to occur

Question 19

What is used to keep two half-cells apart but allow charges to flow

Answer 19

A salt bridge or porous barrier

Question 20

In an electrochemical cell, electrons are generated at the

Answer 20

Anode

Question 21

What happens with the cathode and anode touch?

Answer 21

A transfer of heat accompanies the electron transfer

Question 22

The electrolysis of water results in?

Answer 22

water and oxygen

Question 23

What type of overall reaction occurs in an electrolytic cell?

Answer 23

Oxidation reduction and non spon

Question 24

What element is extracted by way of the electrolysis of bauxite

Answer 24

Aluminum

Question 25

What are the two main reasons we use lithium in batteries?

Answer 25

It is extremely lightweight and has a ton of energy

Question 26

What are the benefits of a fuel cell over other types of batteries?

Answer 26

It can be recharged