Electrochemistry 0.0 / 5 ? ChemistryAtoms and compoundsIGCSECIE Created by: JayT23Created on: 24-03-14 18:28 Electrochemical Cells made up of... 2 Metals of different Reactivity dipped into an electrolyte 1 of 12 The more reactive metal is the cathode/anode? Cathode 2 of 12 Less reactive metal is the... Anode 3 of 12 Electrochemical cell cathode half-equation (take Zinc) Zn(s) Zn (aq) + 2e 4 of 12 Electrochemical cell anode equation (take copper) 2H (g) + 2e H (g) 5 of 12 What causes the voltage in Electrochemical cells? Difference in ability of metal ions to release electrons. 6 of 12 Disadvantages of Fuel Cells (3) Bulky, Eventually lose power. Harmful substances difficult to dispose of safely. 7 of 12 Fuel Cell Negative Electrode Acidic Electrolyte Equation 2H (g) 4H (aq) + 4e 8 of 12 Fuel Cell Positive Electrode Acidic Electrolyte Equation O (g) + 4H (aq) + 4e 2H O(l) 9 of 12 Fuel Cell Negative Electrode Alkaline Electrolyte Reaction 2H (g) + 4OH (aq) 4H O(l) 4e 10 of 12 Fuel Cell Positive Electrode Alkaline Electrolyte Reaction O (g) + 2H O(l) + 4e 4OH (aq) 11 of 12 Advantages of Fuel Cells 1. Only produces water. 2 More Efficient 3 Lightweight 4 Don't need recharging like batteries 12 of 12
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