Rest of C4

Question 1

How are metals below and above carbon extracted

Answer 1

Above carbon - electrolysis
Below carbon - reduction

Question 2

Fe + CuSO4 → FeSO4 + Cu
Complete redox equation for Iron and Copper
Think about shells
Write out fr

Answer 2

Fe → Fe2+ + 2e- - oxidised lost 2 electrons
Cu2+ + 2e- → Cu - reduced gained two electrons

Question 3

Zn + FeSO4 → ZnSO4 + Fe
Write an Ionic equation and state REDOX
Write out

Answer 3

Zn + Fe2+ → Zn2+ + Fe
Zn - Oxidation
Fe - Reduction

Question 4

What is mixed with Aluminium oxide to reduce its melting point

Answer 4

Cryolite

Question 5

How are unreactive metals extracted

Answer 5

Mining

Question 6

Fe + Cu2+ → Fe2+ + Cu
Half ionic equation for Fe and Cu
State REDOX
Write out

Answer 6

Fe - 2e- → Fe2+ -Oxidation
Cu2+ + 2e- → Cu - Reduction

Question 7

What is the Anode of and why does it need to be replaced regularly

Answer 7

Made of carbon
At high temperatures it
Reacts with oxygen to produce CO2

Question 8

Molten:
What is the positive/negative electrode - PANIC
What is produced where
What happens at each node(REDOX)
Sodium Chloride

Answer 8

Positive - Anode
Negative - Cathode
Cathode- Sodium (metal)- positive ions - reduction
Anode - Chlorine (non-metal) - negative ions - oxidation

Question 9

Aqueous:
Copper Sulfate
What is produced at positive/negative electrode

Answer 9

Anode - Oxygen and water (no halide cuz sulfur ain)
Cathode - Copper (Less reactive than hydrogen)

Question 10

Aqueous:
Copper Sulfate
What is produced at positive/negative electrode

Answer 10

Anode - Oxygen and water (no halide cuz sulfur ain)
Cathode - Copper (Less reactive than hydrogen)

Question 11

Aqueous:
Sodium Chloride
What is produced at positive/negative electrode

Answer 11

Anode - Chlorine ( Halide present)
Cathode - Hydrogen (Sodium is more reactive than Hydrogen)