3508593
Description
Flashcards by Fiona Heathcote, updated more than 1 year ago
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Created by Fiona Heathcote
over 8 years ago
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| Question | Answer |
| Electrolysis involves the passage of electricity through a conducting liquid to cause a _______ reaction to occur | redox |
| During electrolysis ___________ energy is converted into ____________ energy | electrical chemical |
| Electrolysis involves spontaneous/non-spontaneous reactions | non-spontaneous |
| Electroplating is ... | ...the deposition* of a layer of metal on the surface of another metal *deposition means to deposit, or to put something in a place. |
| Electroplating is performed in an _____________ cell | electrolytic |
| The object to be plated (to have a thin layer of metal deposited on it) is connected to the positive/negative terminal of the power supply | negative |
| The object to be plated is regarded as the positive/negative electrode | negative |
| What is the half equation for the reaction at the anode? | Ag (s) → Ag + (aq) + e- |
| What is the half equation for the reaction at the cathode? | Ag+ (aq) + e- → Ag (s) |
| In an electrolytic cell, both the anode and the cathode are immersed in a solution known as an ______________ | electrolyte |
| An electrolyte is... | ...a solution that contain ions that are free to move and therefore conducts electricity |
| When an electrolytic cell is working, the power supply acts as an "electron pump". Electrons are pushed onto the ___________ electrode and are removed from the _____________ electrode. | negative positive |
| What reaction occurs at the negative electrode during electrolysis? | reduction |
| What reaction occurs at the positive electrode during electrolysis? | oxidation |
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