C5 Electrolysis

Question 1

Molten PbBr²

Ions:
Anode:
Cathode:

Answer 1

Ions: Pb²+ Br-
Anode: 2Br- —> Br₂ + 2e-
Cathode: Pb²+ + 2e- —> Pb

Question 2

HCL (aq)

Ions:
Anode:
Cathode:

Answer 2

Ions: H+ Cl- H+ OH-
Anode: 2Cl- —> Cl₂ + 2e-
Cathode: 2H+ —> H₂ + 2e-

Question 3

H₂SO₄ (aq)

Ions:
Anode:
Cathode:

Answer 3

Ions: H+ SO₄ ²- H+ OH-
Anode: 4OH- —> O₂ + 2H₂O + 4e-
Cathode: 2H+ —> H₂ + 2e-

Question 4

NaCl (aq)

Ions:
Anode:
Cathode:

Answer 4

Ions: Na+ Cl- H+ OH-
Anode: 2Cl- —> Cl₂ + 2e-
Cathode: 2H+ + 2e- —> H₂

Question 5

Molten Al₂O₃

Ions:
Anode:
Cathode:

Answer 5

Ions: Al³+ O²-
Anode: 2O²- —> O₂ + 4e-
Cathode: Al³+ + 3e- —> Al

Question 6

CuSO₄ (aq)
copper electrodes

Ions:
Anode:
Cathode:

Answer 6

Ions:
Anode:
Cathode:

Question 7

CuSO₄ (aq)
carbon electrodes

Ions:
Anode:
Cathode:

Answer 7

Ions:
Anode:
Cathode:

Question 8

What does PANIC stand for?

Answer 8

P oisitive
A node
N egative
I s
C athode

Question 9

What does OIL RIG stand for?

Answer 9

O xidation
I s
L oss of electrons

R eduction
I s
G ain of electrons

Question 10

Anion

Answer 10

attracted to the anode (+)
= is negative

Question 11

Cation

Answer 11

attracted to the cathode (-)
= positive