Gcse Chemistry Definitions 0.0 / 5 ? ChemistryDefinitionsGCSEAQA Created by: BilbolymanCreated on: 04-12-17 14:18 The minimum amount of energy required for a reaction to take place. Activation energy 1 of 17 A substance that speeds up the rate of a chemical reaction it cant be used up. Catalyst 2 of 17 Where nothing can enter or leave Closed system 3 of 17 The process by which an ionic compound is broken down into its elements using an electrical current. Electrolysis 4 of 17 When the rate of forward reaction is equal to the rate of backwards reaction. Equilibrium 5 of 17 A reaction that gives out energy to the surroundings. Exothermic reaction 6 of 17 A reaction that takes in energy from the surroundings. Endothermic reaction 7 of 17 A molecule that contains only carbon and hydrogen atoms. Hydrocarbon 8 of 17 A rule that can predict the effect of changing conditions on a system that is in equilibrium. Le Chatelier's Principle 9 of 17 The strong attraction between metal ions and delocalized electrons. Metallic bond 10 of 17 When a species loses electrons Oxidation 11 of 17 Sticky Viscous 12 of 17 large molecules formed when lots of smaller monomer molecules join together. Polymer 13 of 17 An accurate technique that can be used to find out how much of an acid is needed to neutralize an alkali. Titration 14 of 17 A hydrocarbon molecule with at least one double carbon - carbon bond. Unsaturated 15 of 17 A hydrocarbon molecule that only contains single carbon - carbon bonds Saturated 16 of 17 A reaction that go forwards or backwards. Reversible reaction 17 of 17
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