Ionic Bonding

Question 1

what is ionic bonding?

Answer 1

electrostatic attraction between positive and negative ions, forming ionic compounds

Question 2

how are solid giant ionic lattices formed?

Answer 2

oppositely charged ions strongly attracted in all directions

Question 3

what is the state of ionic compound at room temperature?

Answer 3

solid

Question 4

what is the structure of ionic compounds?

Answer 4

giant ionic lattices

Question 5

why do ionic compounds have high melting points and boiling points?

Answer 5

• ionic compounds are giant ionic lattices
• there is strong electrostatic forces of attraction between oppositely charged ions
• a lot of energy is required to overcome the strong force of attraction between ions = high mp and bp

Question 6

what is the solubilitity of ionic compound?

Answer 6

• they dissolve in polar molecules
• polar water molecules break down the lattice and surround each ion in solution

Question 7

why do some ionic compounds have even higher melting points?

Answer 7

• greater ionic charges and size of ions makes a stronger attraction between ions

Question 8

what is the electric conductivity of ionic compounds?

Answer 8

• don’t conduct electricity in solid states
• conduct electricity in liquid and aqueous states

Question 9

what happens to solubility when ionic charge increases and why?

Answer 9

solubility decreases
- in a compound made from ions with large charges, ionic attraction is too strong for water to break down the lattice structure, compound is insoluble

Question 10

why can’t ionic compounds conduct electricity in solid state?

Answer 10

• ions are in a fixed position in a giant ionic lattice
• no mobile charge carriers

Question 11

why can ionic compounds conduct electricity in liquid and aqueous states?

Answer 11

• solid giant ionic lattice is broken down
• ions are now free to move, delocalised ions are present to be mobile charge carriers

Question 12

what are the properties of ionic compounds?

Answer 12

• high melting and boiling points
• dissolve best in polar solvents
• conduct electricity when in liquid or aqueous states

Question 13

what is an ionic lattice?

Answer 13

• repeating pattern of oppositely charged ions