Electrochemistry

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  • Created by: JayT23
  • Created on: 24-03-14 18:28
Electrochemical Cells made up of...
2 Metals of different Reactivity dipped into an electrolyte
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The more reactive metal is the cathode/anode?
Cathode
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Less reactive metal is the...
Anode
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Electrochemical cell cathode half-equation (take Zinc)
Zn(s) Zn (aq) + 2e
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Electrochemical cell anode equation (take copper)
2H (g) + 2e H (g)
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What causes the voltage in Electrochemical cells?
Difference in ability of metal ions to release electrons.
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Disadvantages of Fuel Cells (3)
Bulky, Eventually lose power. Harmful substances difficult to dispose of safely.
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Fuel Cell Negative Electrode Acidic Electrolyte Equation
2H (g) 4H (aq) + 4e
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Fuel Cell Positive Electrode Acidic Electrolyte Equation
O (g) + 4H (aq) + 4e 2H O(l)
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Fuel Cell Negative Electrode Alkaline Electrolyte Reaction
2H (g) + 4OH (aq) 4H O(l) 4e
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Fuel Cell Positive Electrode Alkaline Electrolyte Reaction
O (g) + 2H O(l) + 4e 4OH (aq)
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Advantages of Fuel Cells
1. Only produces water. 2 More Efficient 3 Lightweight 4 Don't need recharging like batteries
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Card 2

Front

The more reactive metal is the cathode/anode?

Back

Cathode

Card 3

Front

Less reactive metal is the...

Back

Preview of the front of card 3

Card 4

Front

Electrochemical cell cathode half-equation (take Zinc)

Back

Preview of the front of card 4

Card 5

Front

Electrochemical cell anode equation (take copper)

Back

Preview of the front of card 5
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