chapter 19

Question 1

Redox reaction

Answer 1

A chemical reaction in which electrons are transmitted from one reaction to another

Question 2

Oxidation number

Answer 2

the charge an atom would have if electrons were transferred completely

Question 3

Galvanic Cell

Answer 3

an electrochemical cell in which a spontaneous chemical reaction generates a flow of electrons

Question 4

Anode

Answer 4

the half cell where the oxidation half reaction takes place

Question 5

Cathode

Answer 5

the half cell where the reduction half reaction takes place

Question 6

electrodes

Answer 6

are conductive surfaces through which electrons can enter or leave the half cells

Question 7

salt bridge

Answer 7

contains cations that migrate towards cathode and anions that migrate towards anode

Question 8

Electrical current

Answer 8

is the flow of electric charge

Question 9

electrochemical cell

Answer 9

a device that carries out the generation of electricity through redox reactions

Question 10

electrolytic cell

Answer 10

consumes electrical current to drive a non spontaneous chemical reaction

Question 11

half cell

Answer 11

is one half of an electrochemical cell in which either oxidation or reduction occurs

Question 12

potential difference or electromotive force (emf)

Answer 12

is a measure of the difference in potential energy per unit of charge. 1 Volt= 1 J/C

Question 13

Standard Hydrogen electrode

Answer 13

The half cell electrode that is normally chosen to have a potential of zero

Question 14

Electrolysis

Answer 14

is when an electrical current drives an otherwise nonspontaneous redox reaction in an electrolytic cell