Chapter 18 Key Terms

Question 1

Alkaline Battery

Answer 1

Dry cell battery that employs different half reactions in a basic medium

Question 2

Ampere (A)

Answer 2

SI unit for electrical current (1 A = 1 C/2)

Question 3

Anode

Answer 3

Electrode in an electrochemical cell that donates electrons, becomes oxidized

Question 4

Cathode

Answer 4

Electrode in an electrochemical cell that accepts electrons, becomes reduced

Question 5

Cell potential

Answer 5

Potential difference between cathode and anode in an electrochemical cell

Question 6

Corrosion

Answer 6

The gradual oxidation of metals that occurs when they are exposed to oxidation in environment

Question 7

Dry Cell Battery

Answer 7

A battery that does not contain a large amount of liquid water, often using oxidation of zinc and reduction of MnO2

Question 8

Electrical Current

Answer 8

Flow of charge

Question 9

Electrochemical Cell

Answer 9

Decide in which an electric current produces or is created by a chemical reaction

Question 10

Electrolysis

Answer 10

Process by which electrical current drives a nonspontaneous reaction

Question 11

Electrolytic Cell

Answer 11

Cell which uses electrolysis

Question 12

Electromotive Force (emf)

Answer 12

Force resulting in motion of e- due to potential difference

Question 13

Faraday’s Constant (F)

Answer 13

Charge in Coulombs of 1 mol of electrons. F=96485

Question 14

Fuel Cell

Answer 14

Voltaic cell using oxidation of hydrogen and reduction of oxygen to provide current

Question 15

Half Cell

Answer 15

One half of an electrochemical cell

Question 16

Nernst Equation

Answer 16

Equation relating cell potential of a cell to standard cell potential and Q
Ecell=E*cell-(.0592/n)(log(Q))

Question 17

Potential Difference

Answer 17

Difference in potential energy per charge unit

Question 18

Salt bridge

Answer 18

Inverted, U shaped tube containing a strong electrolyte that connects half cells

Question 19

Standard Cell potential (E*cell)

Answer 19

Cell potential for a system in standard states

Question 20

Standard Hydrogen Electrode

Answer 20

Half cell consisting of an inert platinum electrode immersed in 1M HCl with hydrogen gas bubbles; standard of potential at 0

Question 21

Voltaic/Galvanic Cell

Answer 21

Cell that produces electrical current from a spontaneous reaction