Chapter 8

Question 1

oxidation:

Answer 1

gain in oxygen and loss in hydrogen. electrons are on right of equation

Question 2

reduction:

Answer 2

loss of oxygen and gain in hydrogen. Electrons are on left of equation

Question 3

eletrochemical cell:

Answer 3

electricity generation through redox reactions

Question 4

voltaic cell:

Answer 4

is an electrochemical cell that produces electrical current from a spontaneous chemical reaction

Question 5

electrolytic cell:

Answer 5

consumes electrical current to drive a nonspontaneous chemical reaction

Question 6

in a voltaic cell the potential difference between the cathode and anode is called what?

Answer 6

cell potential or EMF

Question 7

a negative E cell indicates what?

Answer 7

the forward reaction is not spontaenous

Question 8

anode:

Answer 8

is electrical source; oxidation occurs, negatively charged electrode

Question 9

chathode:

Answer 9

is electrical sink; reduction occurs, positively charged electrode

Question 10

what does the salt bridge allow?

Answer 10

serves the complete the circuit allowing electrical current to flow

Question 11

standard hydrogen electrode (SHE)

Answer 11

the half cell electrode that is normally assignmed a potential of zero

Question 12

how do we define estandard cell?

Answer 12

as the difference in voltage between the cathode (final state) and the anode (initial state)

Question 13

acids dissolve …..

Answer 13

active metals

Question 14

when a redox reaction within a voltaic cell occurs under standard conditions, Q=1; therefore Ecell=

Answer 14

Estandard Cell