module 2: 5.2 ionic bonding and structure

Question 1

define the term ionic bonding

Answer 1

ionic bonding is the electrostatic attraction between positive and negative ions. It holds together cations and anions in ionic compounds.

Question 2

ionic compound melting and boiling points

Answer 2

they have high melting and boiling points

Question 3

solubility of ionic compounds

Answer 3

many ionic compounds dissolve in polar solvents (water)

Question 4

what 2 main processes does solubility require

Answer 4

• the ionic lattice must be broken down

- water molecules must attract and surround the ions

Question 5

electrical conductivity of ionic compounds

Answer 5

solid - does NOT conduct electricity

melted - does conduct electricity

dissolved in water - does conduct electricity

Question 6

ionic compounds in the solid state (electrical conductivity)

Answer 6

• the ions are in a fixed position in the giant ionic lattice, meaning they cant move
• there are no mobile charge carriers
• no conductivity

Question 7

ionic compounds in the liquid state or dissolved in water (electrical conductivity)

Answer 7

• the solid ionic lattice breaks down
• the ions are now free to move as the mobile charge carriers
• ions are not fixed in a lattice
• electricity is conducted