F325 Definitions

No description yet. This curated deck is ready for daily study.

Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Acid dissociation constant

Back (Answer)

For an acid HA, Ka = [H+][A-]/[HA] pKa = -log10Ka Ka = 10^-pKa

Front (Question)

Acid - Base Pair

Back (Answer)

A pair of two species that differ by a proton.

Front (Question)

Activation Energy

Back (Answer)

The minimum energy required to start a reaction by the breaking of bonds.

Front (Question)

Alkali

Back (Answer)

A type of base that dissolves in water to form hydroxide ions (OH- ions).

Front (Question)

Average Bond Enthalpy

Back (Answer)

The average enthalpy change that takes place when breaking, by homolytic fission, 1 mol of a given type of bond in the molecules of a gaseous species.

Front (Question)

Boltzmann Distribution

Back (Answer)

A diagram showing the distribution of energies of the molecules at a particular temperature.

Front (Question)

Bond dissociation enthalpy

Back (Answer)

The enthalpy change that takes place when breaking, by homolytic fission, 1 mol of a given bond in the molecules of a gaseous species.

Front (Question)

Brønsted-Lowry Acid

Back (Answer)

A proton Donor

Front (Question)

Brønsted-Lowry Base

Back (Answer)

A proton Acceptor

#10

Front (Question)

Buffer Solution

Back (Answer)

A solution which minimises the pH change when a small amount of a strong acid or base is added.

#11

Front (Question)

Catalyst

Back (Answer)

A substance that increases the rate of reaction by creating an alternative reaction pathway without being used up in the process.

#12

Front (Question)

Complex ion

Back (Answer)

Transition Metal ion bonded to a number of ligands by dative covalent bonds (also known as coordinate bonding).

#13

Front (Question)

Conjugate Acid

Back (Answer)

A species formed when a proton is added to a base.

#14

Front (Question)

Conjugate Base

Back (Answer)

A species formed when a proton is removed from an acid.

#15

Front (Question)

Coordination Number

Back (Answer)

The total number of coordinate bonds formed between the central metal ion and any ligands.

#16

Front (Question)

Displacement Reaction

Back (Answer)

A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of its ions.

#17

Front (Question)

Disproportionation reaction

Back (Answer)

The oxidation and reduction of the same species in a redox reaction.

#18

Front (Question)

Dynamic Equilibrium

Back (Answer)

The equilibrium that exists in a closed system when the rate of the forwards reaction is equal to the rate of the reverse reaction.

#19

Front (Question)

Enthalpy change of atomisation

Back (Answer)

Enthalpy change when 1 mole of gaseous atoms are formed from the element in its standard state.

#20

Front (Question)

Enthalpy change of formation

Back (Answer)

Enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions.

#21

Front (Question)

Enthalpy change of combustion

Back (Answer)

Enthalpy change when 1 mole of a substance is reacted completely with oxygen under standard conditions, all reactant s and products being in their standard states.

#22

Front (Question)

Enthalpy change of hydration

Back (Answer)

Enthalpy change when 1 mole of gaseous ions is dissolved in water to form 1 mole of aqueous ions, under standard conditions.

#23

Front (Question)

Enthalpy change of neutralisation

Back (Answer)

Energy change when one mole of water is created by the neutralisation of an acid with an alkali under standard conditions.

#24

Front (Question)

Enthalpy change of reaction

Back (Answer)

Enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states.