Terms in this set (54)
Activation energy The minimum energy needed to start a reaction by the breaking of bonds
Alkali A soluble base which releases hydroxide/OH- ions
Atomic orbital A region of space around the nucleus that can hold up to two electrons with
opposite spins
Bond enthalpy The energy needed to break one mole of a specified bond in the gas state
Brønsted-Lowry acid A proton/H+ donor
Brønsted-Lowry base A proton/H+ acceptor
Buffer solution A system which minimises pH changes when small amounts of acid or base
are added
, Catalyst A substance which increases the rate of reaction by providing an alternative
route of lower activation energy
Conjugate acid-base pair A pair of species in an acid-base equilibrium that transform into each other
by gain or loss of a proton
Concordant titres Titres that agree to within 0.10 cm3 of each other
Covalent bond Electrostatic attraction between a shared pair of electrons and the nuclei of
the bonded atoms
d-block element An atom that has its highest energy electron in a d sub-shell
Dative covalent/coordinate bond A shared pair of electrons in which the bonded pair has been provided by
one of the bonding atoms
Disproportionation A redox reaction where the same element is oxidised and reduced
Activation energy The minimum energy needed to start a reaction by the breaking of bonds
Alkali A soluble base which releases hydroxide/OH- ions
Atomic orbital A region of space around the nucleus that can hold up to two electrons with
opposite spins
Bond enthalpy The energy needed to break one mole of a specified bond in the gas state
Brønsted-Lowry acid A proton/H+ donor
Brønsted-Lowry base A proton/H+ acceptor
Buffer solution A system which minimises pH changes when small amounts of acid or base
are added
, Catalyst A substance which increases the rate of reaction by providing an alternative
route of lower activation energy
Conjugate acid-base pair A pair of species in an acid-base equilibrium that transform into each other
by gain or loss of a proton
Concordant titres Titres that agree to within 0.10 cm3 of each other
Covalent bond Electrostatic attraction between a shared pair of electrons and the nuclei of
the bonded atoms
d-block element An atom that has its highest energy electron in a d sub-shell
Dative covalent/coordinate bond A shared pair of electrons in which the bonded pair has been provided by
one of the bonding atoms
Disproportionation A redox reaction where the same element is oxidised and reduced
