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AQA C3 CHEM (SVS)

AQA svs docshort severnvale - C3 Chemistry keywords

QuestionAnswer
Activation energy Minimum energy required for a reaction to happen
Alcohol Contains the -OH functional group
Alkali metal Group I of the Periodic Table
Ammonia Made in the Haber Process
Atomic number Number of protons or electrons
Atomic structure Arrangement of electrons
Atomic Mass Number of protons and neutrons
Biofuels Fuels made from biomass
Bond energy Energy required to break a bond
Burette Used to precisely dispense a volume for titrations
Calorimeter Used to measure energy changes in reactions
Carboxylic acid Contains the functional group -COOH
Catalyst Lowers activation energy and increase rate of reaction
Chlorine Added to water to disinfect
Closed system Where no products, reactants
Concentration The amount of a chemical in solution
Displacement Where a more reactive Halogen knocks a less reactive one out of a compound
Endothermic Energy is absorbed from the surroundings – temperature decreases
End-point The point at which exactly the right quantities of acid and alkali have reacted
Equilibrium Balance between reactants forming the products and products re-forming the reactants
Esters Contains the functional group –COO-
Ethanol An alcohol that has 2 Carbon atoms and is found in alcoholic drinks
Exothermic Energy is released to the surroundings – temperature increases
Flame test Determines the presence or absence of positive ions
Fluoride Added to drinking water to help prevent tooth decay
Functional group Gives a ‘family’ of organic compounds their characteristic reactions
Group Vertical column in Periodic Table
Haber process Chemical process that forms Ammonia when Nitrogen and Hydrogen react
Halide An Halogen that has gained an electron to form an ionic compound
Halogen Group 7 of the period table – poisonous, non-metals
Hard water Can be temporary or permanent. Due to dissolved ions (Ca2+ or Mg2+)
Homologous series Family of compounds that have the same functional group
Indicator Used to determine the end-point of Acid/Base reactions
Ion-exchange Where Ca2+ or Mg2+ ions are replaced with Na+ from a resin
Non-renewable Takes a long time (millions of years) to replace
Optimum The maximum amount you can achieve
Oxidised Oxygen is added either by chemical means or by action of microbes
Permanent hardness Hardness caused by Mg and Ca sulfate. Cannot be softened
Pipette Used to dispense an exact volume of solution
Precipitate When an insoluble solid forms in solution
Qualitative Determines the presence or absence of an ion in a solution
Quantitative Determines the exact amount (concentration) of an ion in a solution
Rate How fast a chemical reaction proceeds
Renewable When a resource can be replaced quickly (e.g. biomass)
Reversible reaction Reactants form products and products form reactants
Scale Insoluble precipitate of calcium or magnesium carbonate
Scum The reaction of soap with calcium or magnesium ions
Soft water Water that does not contain calcium or magnesium ions
Softening Removing calcium or magnesium ions from water
Strong acid An acid where the H+ is completed ionised (dissociated)
Temporary hardness The portion of total hardness that can be removed by boiling
Titration Technique to work out exact volumes of acid and alkali that react exactly
Transition metal Contains a sub-shell of electrons
Water filter Removes impurities from water
Weak acid An acid where there is not complete dissociation
Yield The amount of product made in a reaction
Group Vertical column in the Periodic Table
Period Horizontal row in the Periodic Table
Created by: docshort