Chemistry Summative Prep:) Flashcards
1
Q
Define Electrolysis
A
Breaking down of an ionic compound using electricity.
2
Q
Define Anode
A
Positive electrode
3
Q
Define Cathode
A
Negative electrode
4
Q
Define Electrolyte
A
molten or aqueous substance which undergoes electrolysis.
5
Q
ანოდზე ჟანგბადიანს დაასწრებს OH!
A
:)
6
Q
კათოდზე H-ზე უფრო რეაქტიულს დაასწრებს H!
A
:)
7
Q
In which way do electrons move in the external circuit?
A
In electrolysis the electrons move toward the cathode in the external circuit.
8
Q
Define Oxidation
A
Loss of electrons (On Anode)
9
Q
Define Reduction
A
Gain of electrons (On Cathode)
10
Q
NO3 charge
A
-1
11
Q
SO4 charge
A
-2
12
Q
3 Advantages of hydrogen fuel cell:
A
- Produces no pollution.
- Releases more energy.
- Less noise pollution.
13
Q
3 Disadvantages of hydrogen fuel cell:
A
- More expensive
- Hydrogen is difficult to store as it is flammable.
- Hydrogen is obtained from the combustion of fossil fuels.
14
Q
Half equations and overall equation of hydrogen fuel cell:
A
check on your notebook:)
15
Q
Main reasons for electroplating
A
- Improves appereance
- Resists corrosion
- Increases durability
- Increases hardness
