Definitions

Question 1

Whats an acid?

Answer 1

A species that releases H+ ions in aqueous solution

Question 2

Acid Dissociation Constant?

Answer 2

The equilibrium constant that shows the extent of dissociation of a weak acid.

For a weak acid HA(aq), Ka = [H+(aq)][A-(aq)] / [HA(aq)]

Question 3

Acid-base pair

Answer 3

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

Question 4

Activation Energy

Answer 4

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

Question 5

Actual Yield

Answer 5

The amount of product obtained from a reaction

Question 6

Addition Polymerisation

Answer 6

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

Question 7

Addition Reaction

Answer 7

A reaction in which two reactants join together to form one product.

Question 8

Adsorption

Answer 8

The process that occurs when a gas or liquid or solute is held to the surface of a solid.

Question 9

Alicyclic

Answer 9

Containing carbon atoms joined together in a ring that’s not aromatic.

Question 10

Aliphatic

Answer 10

Containing carbon atoms joined together in straight or branched chains.

Question 11

Alkali

Answer 11

A type of base that dissolves in water forming hydroxide ions, OH- (aq) ions.

Question 12

Alkanes

Answer 12

The hydrocarbon homologous series with single carbon to carbon bonds and the general formula CnH2n+2

Question 13

Alkenes

Answer 13

The hydrocarbon homologous series with at least one double carbon to carbon double bond.

Question 14

Alkyl Group

Answer 14

A side chain formed by removing a hydrogen atom removed from an alkane parent chain, for example, CH3, C2H5 : any alkyl group is often shown as R

Question 15

Alkynes

Answer 15

The hydrocarbon homologous series with at least one triple carbon to carbon bond.

Question 16

Amount of a substance

Answer 16

The quantity whose unit of the mole, used as a means of counting any species such as atoms, ions and molecules.

Question 17

Anhydrous

Answer 17

Containing no water molecules.

Question 18

Anion

Answer 18

A negatively charged ion with more electrons than protons.

Question 19

Aromatic

Answer 19

Containing one or more benzene rings.

Question 20

Atom Economy

Answer 20

(Sum of molar masses of desired products) / (Sum of molar masses of all products) x 100