A2 CHEM KEYWORDS 0.0 / 5 ? ChemistryAcids, bases and saltsA2/A-levelOCR Created by: R MalikCreated on: 06-11-19 06:39 acid a species that releases H+ ions in aqueous solution. 1 of 21 acid dissociation constant Ka the equilibrium constant that shows the extent of dissociation of a weak acid. For a weak acid HA(aq), Ka = + [H (aq)][A (aq)] [HA(aq)] . 2 of 21 acid–base pair a pair of two species that transform into each other by gain or loss of a proton. 3 of 21 activation energy the minimum energy required to start a reaction by the breaking of bonds 4 of 21 actual yield the amount of product obtained from a reaction. 5 of 21 addition polymerisation formation of a very long molecular chain, by repeated addition reactions of many unsaturated alkene molecules (monomers) 6 of 21 addition reaction a reaction in which a reactant is added to an unsaturated molecule to make a one saturated molecule. 7 of 21 adsorption n the process that occurs when a gas or liquid or solute is held to the surface of a solid. 8 of 21 alicyclic containing carbon atoms joined together in a ring that is not aromatic 9 of 21 aliphatic containing carbon atoms joined together in straight or branched chains. 10 of 21 alkali a type of base that dissolves in water forming hydroxide ions, OH– (aq) ions. 11 of 21 alkanes the hydrocarbon homologous series with single carbon-to-carbon bonds and the general formula: CnH2n+2. 12 of 21 alkenes the hydrocarbon homologous series with at one double carbon-to-carbon bonds and the general formula: CnH2n. 13 of 21 alkyl group a side chain formed by removing a hydrogen atom removed from an alkane parent chain, for example, CH3, C2H5; any alkyl group is often shown as R. 14 of 21 alkynes the hydrocarbon homologous series with one triple carbon-to-carbon bonds and the general formula: CnH2n–2. 15 of 21 amount of substance the quantity whose unit of the mole, used as a means of counting any species such as atoms, ions and molecules. 16 of 21 anhydrous containing no water molecules. 17 of 21 anion a negatively charged ion with more electrons than protons 18 of 21 aromatic containing one or more benzene rings. 19 of 21 atom economy (sum of molar masses of desired products)/(sum of molar masses of all products) Å~100%. 20 of 21 atomic (proton) number the number of protons in the nucleus of an atom. 21 of 21
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