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11 Cards in this Set
- Front
- Back
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Electrochemical cell |
1. Generate electricity 2. Cathode: is positively charged (reduction) 3. Anode: is negatively charged (oxidation) 4. Electrodes cannot be inert |
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Electrolytic cell |
1. A battery is needed 2. Anode: is positively charged (attracts anions, oxidation) 3. Cathode: is negatively charged (attracts cations, reduction) 4. Electrodes can be inert |
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inert electrodes |
Carbon, platinum |
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Factors affecting what is discharged |
1. Types of electrodes 2. Concentration of electrolyte (>electrochemical series) 3. State of electrolyte: Molten/Aqueous? 4. Reactivity/electrochemical series - more reactive, more easily ionized - more inert, more easily discharged |
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Electrochemical series for anions |
SO4 NO3 Cl Br I OH |
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Bond forming |
- H |
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Bond breaking |
+H |
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Endothermic delta H |
positive |
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Exothermic delta H |
negative |
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Endo example |
1. most decomposition reaction 2. C, CO, H2 reduces metal oxides 3. 2NH4Cl(s) +Ba(OH)2•8H2O(s) → BaCl2(s) +2NH3(g) +10H2O(l) 4. hydrolysis |
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Exo example |
1. most combination reaction 2. combustion 3. neutralisation 4. most double replacement 5. metal + acid 6. metal + water |
