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7 Cards in this Set
- Front
- Back
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What half cell is oxidised? |
The half cell with the lowest Ecell value. |
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What is standard electrode potential? |
The maximal electromotive force of a half cell compared with a standard hydrogen cell. |
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What is a standard hydrogen cell? |
A 1moldm-3 solution of H+ ions with 100kPa H2 gas and a platinum electrode at 298K. With an Ecell value of 0. |
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Limitations of predictions using Ecell values: |
High activation energy- slower rate. If solutions are non standard concentration equilibrium will be shifted, so rate may be different. |
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What is a primary cell? |
Non rechargeable cells. Chemicals used up and voltage falls. |
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What is a secondary cell? |
Rechargeable cells. The reaction can be reversed for recharging. |
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What is a fuel cell? |
Fuel and oxygen enter the cell, products flow out. The electrolyte remains in. They can operate continuously and don't need recharging. |
