Module 5

Question 1

Define the rate determining step.

Answer 1

The slowest step in the reaction mechanism of a multi step mechanism

Question 2

Define an homogenous equilibrium.

Answer 2

An equilibrium in which all the species making up the reactants and products have the same physical state

Question 3

Define a Bronsted-Lowry acid.

Answer 3

A species that is a proton donor

Question 4

Define a Bronsted-Lowry base.

Answer 4

A species that is a proton donor

Question 5

Define lattice enthalpy.

Answer 5

Enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions

Question 6

Define enthalpy change of atomisation.

Answer 6

Enthalpy change that takes place when one mole of gaseous atoms forms from the element in its standard state

Question 7

Define 1st electron affinity.

Answer 7

Enthalpy change when one electron is added to each atom in one mole of gaseous atoms to form one mole of gaseous 1- ions

Question 8

Define 2nd electron affinity.

Answer 8

Enthalpy change when one electron is added to each ion one mole of gaseous 1- ions to form one mole of gaseous 2- ions

Question 9

Define enthalpy change of solution.

Answer 9

Enthalpy change for one mole of a compound dissolving in water

Question 10

Define enthalpy change of hydration.

Answer 10

Enthalpy change when 1 mole of gaseous ions react and the gaseous ions dissolve in water

Question 11

Define ligands.

Answer 11

A molecule or ion that can donate a pair of electrons to the transition metal ion and forms a coordinate bonds
E.g., bidentate ligand will donate 2 pairs of electrons and form 2 coordinate bonds