Electrochemistry Flashcards Preview

AP Chemistry > Electrochemistry > Flashcards

Flashcards in Electrochemistry Deck (35):
1

What does q stand for?

Charge

2

What does T stand for?

Time

3

In what unit is current measured in?

Amperes (A)

4

In what unit is charge measure in?

Coulombs (c)

5

In what unit is time measured?

Seconds (s)

6

What is Faradays constant?

96,500 coulombs/mol of electrons

7

A device that transfers electrons from one reactant to another through a pathway

Galvanic cells

8

Galvanic cells are always ___________. (delta G

Spontaneous

9

Where oxidation occurs

Anode

10

Where reduction occurs

Cathode

11

U shaped tube containing a solution of gel with soluble ions

Salt bridge

12

What is the function of the salt bridge?

Keeps solutions in have cells neutral

13

The amount of charge that passes through the cross sectional area of a medium per second

Electric current (I)

14

The __________ the voltage the greater the distance between anode and cathode

Greater

15

The difference in potential energy between anode and cathode

Voltage

16

A _________ voltage is thermodynamically favored

Positive

17

Metals with more positive reduction potentials are easily ___________

Reduced

18

Metals with more negative reduction potentials are easily ___________

Oxidized

19

The species with the most positive, least negative reduction potential will be __________

Reduced

20

The overall difference in PE charge between the anode and the cathode

The standard cell potential

21

Voltaic=

galvanic

22

A ______________ standard cell potential means that the reaction is thermodynamically favored

Positive

23

Cell notation goes from ________ to _________

Anode, cathode

24

In what direction do electrons flow?

Anode to cathode

25

What would be the voltage of a galvanic cell without a salt bridge?

0

26

A=

C/s

27

Solid metals are not easily _________

Reduced

28

If the Ecell value is greater than zero, the reaction is __________________ favored

Thermodynamically

29

If the Ecell value is less than zero, than the reaction is ________________ favored

Not thermodynamically favored

30

If if delta G is negative than the reaction is ________________ favored

Thermodynamically

31

If delta G is positive than the reaction is ___________________ favored

Not thermodynamically

32

Electrolytic cells are non ______________

Spontaneous

33

In electrolytic cells the species with the most _____________ reduction potential is reduced

Positive

34

Electrolytic reactions are always _____________________

Non thermodynamically favored

35

In electrolytic cells, species with the most ________ reduction potential is oxidized

Negative