Lecture 2 Electrochemical Cells

Question 1

what is a half cell

Answer 1

an electrode

Question 2

what is daniell cell

Answer 2

Zn + Cu2+ -> Zn2+ + Cu

first battery

Question 3

what is oxidised in daniell cell

Answer 3

zinc

Question 4

what is reduced in daniell cell

Answer 4

copper

Question 5

commonly used inert electrodes

Answer 5

platinum
graphite
graphene
diamond

Question 6

what makes up a hydrogen electrode

Answer 6

hydrogen gas
solution of h+
platinum foil

Question 7

example of metal/metal salt electrode

Answer 7

Saturated KCl
silver wire coated with AgCl
porous wick allowing ions to flow

Question 8

is anode negative or positive

Answer 8

negative

Question 9

is cathode negative or positive

Answer 9

positive

Question 10

which compartment is oxidation

Answer 10

anode

Question 11

which compartment is reduction

Answer 11

oxidation

Question 12

direction of electron flow

Answer 12

negative anode to positive cathode

Question 13

what joins the two solution compartments

Answer 13

salt bridge

Question 14

how to write electrochemical cell diagram

Answer 14

anode on the left
cathode on the right
ions in the middle atoms on the outside
half cell oxidation/reduction in the middle
two lines for salt bridge
state symbols
one line for phase boundary

Question 15

direction of electron flow in cell diagram

Answer 15

left to right

Question 16

what to do if there is an inert electrode on cell diagram

Answer 16

it just goes to the farthest outside