Unit 4 Flashcards
1
Q
What is electrolysis?
A
The decomposition of an ionic compound, when molten or in aqueous solution (electrolyte), by the passage of an electric current
2
Q
What is the positive electrode?
A
Anode
3
Q
What is the negative electrode?
A
Cathode
4
Q
What are electrodes usually made of?
A
Platinum or graphite
5
Q
Why are metal objects electroplated?
A
- Improve appearance
- More resistance to corrosion
6
Q
How does a hydrogen-oxygen fuel cell produce electricity?
A
Uses hydrogen and oxygen to produce electricity with water as the only chemical product.
7
Q
Advantages of Hydrogen-Oxygen Fuel Cells
A
- Less pollution
- High energy efficiency
- Less noise pollution
8
Q
Disadvantages of Hydrogen-Fuel cells
A
- Challenges in storage (due to gaseous state)
- Expensive
- Limited filling infrastructure
- Pollution from manufacture
