Galvanic cell setup

Question 1

Define: galvanic cell

Answer 1

type of cell in which chemical energy is converted to electrical energy

Question 2

is a galvanic cell a type of primary cell?

Answer 2

yes

Question 3

can galvanic cells be either portable or fixed?

Answer 3

yes

Question 4

Define: electrode

Answer 4

solid conductor in each half cell, in which oxidation or reduction occurs.

Question 5

Define: anode

Answer 5

electrode in which oxidation occurs

Question 6

Define: cathode

Answer 6

electrode in which reduction occurs

Question 7

Define: half cell

Answer 7

beakers containing electrodes, and a solution. It contains a conjugate redox pair, and often spectator ions in the solution.

Question 8

Describe the 3 main types of solutions

Answer 8

Metal electrode
inert electrode (platinum/graphite)

Question 9

Describe gas electrode

Answer 9

porous inert electrode in a glass tube, in which gas is pumped.

Question 10

What are inert electrodes used for?

Answer 10

for conjugate redox pairs that don’t have metals Br2(l)/Br-(aq) and Fe3+(aq)/Fe2+(aq)
Gas electrode:

Question 11

Can Fe have an equation that does involve a solid, and one that doesn’t?

Answer 11

YES

Question 12

What electrode has negative polarity?

Answer 12

Where the electrons comes rom

Question 13

Define: external wiring

Answer 13

Wiring connecting the 2 electrodes

Question 14

Direction of electron flow?

Answer 14

From the anode (oxidised so loses electrons) to cathode (reduced so gains electrons)

Question 15

Define: voltmeter

Answer 15

instrument that measures the potential difference between two points in a circuit

Question 16

Define: salt bridge

Answer 16

filter paper soaked with ions that are freely moving, and relatively unreactive in that they don’t form precipitates (usually KNO3)

Question 17

purpose of the salt bridge?

Answer 17

o Salt bridge prevents charges from accumulating in the electrodes, as this would prevent the reaction from continuing. Positive cations flow towards the cathode, which gains electrons and becomes more negative. Hence charges are prevented from accumulating.

Question 18

Galavanic cell is aka

Answer 18

voltaic cell

Question 19

Define: battery

Answer 19

combination of cells connected in a series