Electrochemistry

Question 1

What are the two types of redox half equations?

Answer 1

1. Oxidation
2. Reduction

Question 2

Reduction is ___ of electrons

Answer 2

Gain

Question 3

Oxidation is ___ of electrons

Answer 3

Loss

Question 4

What is an electrode?

Answer 4

Electrical conductor
Normally metallic electrode
Can also be:
1. Semi-conductor
2. Conducting polymer

Electron source! Or sink to drive oxidation or reduction reactions

Solid materials

Question 5

Where do the reactions occur?

Answer 5

On surface between solid electrode and solution

Question 6

What is an electrochemical circuit?

Answer 6

Interconversion of electrical energy and chemical energy

Question 7

What does an electrochemical circuit consist of?

Answer 7

1. Charge moving in a electrical circuit
2. Chemical reactions (usually redox reactions) occurring at the surface of a conducting electrode
3. Ion movement in a solvent

Question 8

What is an anode and draw a diagram of it?

Answer 8

Where oxidation takes place

Question 9

What is a cathode and draw a diagram of it?

Answer 9

Where reduction takes place

Question 10

Draw diagram of anode and cathode working as one electrochemical circuit

Answer 10

Question 11

Draw and label a diagram of a lithium-ion cell (battery)

Answer 11