Judith Madden

Question 1

What is an electrolyte?

Answer 1

A substance that dissociates into ions when in solution
Strong electrolyte - full dissociation
Weak electrolyte - partial dissociation

Question 2

What is a Bronsted-Lowry acid?

Answer 2

Proton donor

Question 3

What is a Bronsted-Lowry base?

Answer 3

Proton acceptor

Question 4

What is a Lewis base?

Answer 4

Electron pair donor

Question 5

What is a Lewis acid?

Answer 5

Electron pair acceptor

Question 6

Kw = ? (number)

Answer 6

1x10-14 mol2 L-2

Question 7

What factor increases the strength of an acid?

Answer 7

An electron withdrawing group

Question 8

What factor decreases the strength of an acid?

Answer 8

An electron releasing group

Question 9

State how HCl behaves in water and acetic acid?

Answer 9

Strong acid in water

Weaker acid in acetic acid

Question 10

State how acetic acid behaves in water and ammonia solution?

Answer 10

Weak in water

Strong in ammonia solution

Question 11

What do protogenic solvents do?

Answer 11

Donate protons

Question 12

What do protophilic solvents do?

Answer 12

Accept protons

Question 13

What do aprotic solvents do?

Answer 13

Neither accept nor donate protons

Question 14

What do amphiprotic solvents do?

Answer 14

Accept and donate protons

Question 15

Are ionised or unionised drugs taken up better by the body? Reason.

Answer 15

Unionised - need to be neutral to pass phospholipid bilayer

Question 16

Heat energy uses which sort of motion?

Answer 16

Disordered chaotic motion

Question 17

Work uses which sort of motion?

Answer 17

Organised motion

Question 18

Heat energy promotes its surroundings to have which sort of motion?

Answer 18

Random motion

Question 19

Work promotes its surrounding to have which sort of motion?

Answer 19

Uniform motion

Question 20

Energy is measured in?

Answer 20

Joules (J)

Question 21

What is an adiabatic system?

Answer 21

A closed system which does not permit transfer of energy as heat

Question 22

Define the enthalpy of reaction?

Answer 22

Enthalpy for the conversion of reactants in their standard state to products in their standard state

Question 23

Define the enthalpy of transition?

Answer 23

Standard enthalpy change accompanying a change of physical state

Question 24

Define the enthalpy of vaporisation?

Answer 24

Heat energy required to convert 1mol of pure substance in the liquid phase to the vapour phase at 1 bar

Question 25

Define enthalpy of sublimation?

Answer 25

Enthalpy change in a direct route between 2 states is the sum of the enthalpy changes for a sequence of enthalpy changes between 2 phases

Question 26

Define the enthalpy of formation?

Answer 26

Standard enthalpy of reaction in which the substance is formed from its elements in their standard state per mole of substance

Question 27

Spontaneous changes are those which...?

Answer 27

increase the entropy of the universe

Question 28

The entropy of an isolated system...?

Answer 28

increases in a spontaneous change

Question 29

For a reaction to be spontaneous what must delta G be?

Answer 29

Negative or equal to zero

Question 30

Does a catalyst shift the equilibrium position?

Answer 30

No, as it affects the forward and backward direction the same

Question 31

Does a catalyst affect delta G?

Answer 31

No