Definitions

Question 0

Acid-base pair

Answer 0

A pair of two species that transform into each other by gain or loss of a proton

Question 1

Acid dissociation constant Ka

Answer 1

=([H+(aq)][A-(aq)])/[HA(aq)]

Question 2

Addition polymer

Answer 2

A very long molecular chain, formed by repeated addition reactions of many unsaturated alkene molecules (monomers)

Question 3

Adsorption

Answer 3

The process by which a solid holds molecules of a gas, liquid or solute as a thin film on the surface of a solid or, more rarely, a liquid

Question 4

Alkali

Answer 4

A type of base that dissolves in water to form hydroxide ions

Question 5

Atom economy

Answer 5

100x(Molecular mass of the desired product)/(sum of molecular masses of all products)

Question 6

Average bond enthalpy

Answer 6

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

Question 7

Biodegradable polymer

Answer 7

A polymer that breaks down completely into carbon dioxide and water

Question 8

Boltzmann distribution

Answer 8

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

Question 9

Buffer solution

Answer 9

A system that minimises pH changes on addition of small amounts of an acid or a base

Question 10

Chemical shift

Answer 10

A scale that compares the frequency