LESSON 7 | Electrochemistry

Question 1

a NEGATIVELY CHARGED atom or group of atoms

Answer 1

ANION

Question 2

Electrode at which oxidation takes place.

Answer 2

Anode

Question 3

One or more voltaic cells joined together as a single unit.

Answer 3

Battery

Question 4

An electrochemical cell or series of cells in which a spontaneous redox reaction generates an electric current.

Answer 4

Battery

Question 5

Electrode at which reduction takes place.

Answer 5

Cathode

Question 6

A positively charged atom or group of atoms.

Answer 6

Cation

Question 7

The electromotive force of an electrochemical cell.
The amount of work the cell can do per coulomb of charge.

Answer 7

Cell Potential

Question 8

The amount of work the cell can do per coulomb of charge.

Answer 8

Cell Potential

Question 9

A voltaic cell composed of zinc and graphite electrodes immersed in an aqueous paste of NH4Cl and MnO2.

Answer 9

Dry cell

Question 10

A flow of electrons through a conductor.

Answer 10

Electricity

Question 11

The study of the connection between oxidation-reduction reactions and the flow of electrons.

Answer 11

Electrochemistry

Question 12

A surface in cell or an electrically conducting site at which either oxidation or reduction reaction takes place.

Answer 12

Electrode

Question 13

The process of forcing electrical energy through an electrolytic cell, thereby causing a chemical reaction.

Answer 13

Electrolysis

Question 14

A solute whose aqueous solution or molten state conducts electricity.

Answer 14

Electrolyte

Question 15

A voltaic cell that converts electrical energy into chemical energy by means of a nonspontaneous reaction.

Answer 15

Electrolytic cell

Question 16

The difference in electric potential between the two electrodes in a galvanic cell.

Answer 16

Electromotive force (EMF)

Question 17

A voltaic cell that can generate continuous flow of electricity from the reaction of hydrogen and oxygen to produce water.

Answer 17

Fuel cell

Question 18

Any electrochemical cell in which a spontaneous chemical reaction generates an electric current.

Answer 18

Galvanic cell

Question 19

A rechargeable voltaic battery composed of lead and lead dioxide electrodes in a sulphuric acid solution.

Answer 19

Lead-acid battery

Question 20

The loss of electrons as indicated by an increase in oxidation state.

Answer 20

Oxidation

Question 21

Also called a redox reaction.

Answer 21

Oxidation-Reduction reaction

Question 22

Chemical reaction involving an exchange of electrons.

Answer 22

Oxidation-Reduction reaction

Question 23

A substance that gains electrons, making it possible for another substance to lose electrons and be oxidized. It is the substance reduced.

Answer 23

Oxidizing agent

Question 24

A tool for keeping track of the flow of electrons in redox reactions. (also called oxidation state)

Answer 24

Oxidation number

Question 25

The charge on an atom in a compound if all atoms were present as monoatomic ions.

Answer 25

Oxidation number

Question 26

A battery that is not rechargeable.

Answer 26

Primary battery

Question 27

The gain of electrons as indicated by a decrease in the oxidation number or state.

Answer 27

Reduction

Question 28

An element, compound, or ion that reduces another reactant. It is the substance oxidized.

Answer 28

Reducing agent

Question 29

used to allow the flow of ions into the individual half-cell compartments in an electrochemical cell and maintain charge neutrality or to keep the charges balanced.

Answer 29

Salt bridge Device

Question 30

Batteries that are rechargeable; the consumed active materials can be regenerated and the battery is reusable for a number of times.

Example: Car battery

Answer 30

Secondary batteries

Question 31

A spontaneous oxidation-reduction reaction that can be used to produce electrical energy.

Answer 31

Voltaic cell