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960 terms · page 15 of 40
Equilibrium Constant
The fixed ratio of product to reactant terms, each raised to its stoichiometric power, that characterises a reaction at a given temperature.
Chemical EquilibriumEquilibrium Constant of a Reversed Reaction
The constant obtained when a reaction is written in the opposite direction, equal to the reciprocal of the original.
Chemical EquilibriumEquilibrium Constant of a Scaled Reaction
The constant obtained when every coefficient in an equation is multiplied by the same factor.
Chemical EquilibriumEquilibrium in Closed Systems
The requirement that no matter enters or leaves for a true chemical equilibrium to be established.
Chemical EquilibriumEquilibrium Position
The particular set of concentrations at which a system settles, describing how far the reaction has proceeded.
Chemical EquilibriumEquilibrium Yield
The proportion of reactant converted to product once equilibrium has been reached.
Acids, Bases & SaltsEquivalence Point
The point in a titration at which exactly stoichiometric amounts of the two reactants have been combined.
Stoichiometry & Chemical ReactionsEquivalent Weight
The mass of a substance that combines with or displaces 1.008 g of hydrogen, 8 g of oxygen or one mole of electrons.
Organic ChemistryEster
A compound formed by replacing the acidic hydrogen of a carboxylic acid with an alkyl group.
Stoichiometry & Chemical ReactionsEsterification
The acid-catalysed condensation of a carboxylic acid with an alcohol to form an ester and water.
Organic ChemistryEther
A compound in which an oxygen atom is bonded to two carbon atoms.
States of Matter & Gas LawsEvaporation
The escape of molecules from the surface of a liquid into the vapour phase below the boiling point.
Stoichiometry & Chemical ReactionsExcess Reagent
A reactant present in a greater amount than is needed to consume the limiting reagent completely.
Thermochemistry & ThermodynamicsExergonic Reaction
A reaction with a negative Gibbs free energy change, which therefore releases usable energy and proceeds spontaneously.
Stoichiometry & Chemical ReactionsExothermic Reaction
A reaction that releases energy to the surroundings, giving a negative enthalpy change.
Chemical Bonding & Molecular StructureExpanded Octet
A bonding arrangement in which a central atom is surrounded by more than eight valence electrons.
Foundations of ChemistryExtensive Property
A property whose value is directly proportional to the quantity of matter in the sample.
Chemical EquilibriumExtent of Reaction
A single variable measuring how far a reaction has progressed from pure reactants towards products.
Atomic Structure & Periodicityf-Block Elements
The lanthanides and actinides, in which electrons fill the f orbitals of the antepenultimate shell.
States of Matter & Gas LawsFace-Centred Cubic
A cubic arrangement with particles at the eight corners and at the centre of each of the six faces.
Chemical Bonding & Molecular StructureFajans' Rules
A set of guidelines predicting how much covalent character an ionic bond will have.
Electrochemistry & RedoxFaraday Constant
The electric charge carried by one mole of electrons.
Electrochemistry & RedoxFaraday's First Law of Electrolysis
The mass of a substance liberated at an electrode is directly proportional to the quantity of electricity passed.
Electrochemistry & RedoxFaraday's Second Law of Electrolysis
When the same quantity of electricity passes through different electrolytes, the masses deposited are proportional to their chemical…