Ionic compound properties

Question 1

what structure is an ionic compound?

Answer 1

lattice structure

Question 2

what does a lattice structure consist of?

Answer 2

• regular arrangement of ions

- held together by strong electrostatic forces between oppositely charged ions

Question 3

name the three main properties of ionic compounds.

Answer 3

• high melting and boiling points
• most dissolve in water
• have the ability to conduct electricity when molten/dissolved but not when solid

Question 4

Explain why magnesium oxide has a higher melting and boiling point than sodium oxide.

Answer 4

The charge difference is greater for magnesium oxide. The electrostatic attractions are strong so it requires a lot more energy to separate the ions to melt it.

Question 5

Explain why sodium chloride conducts electricity when dissolved and molten but not when a solid.

Answer 5

Electric currents can flow through when it is molten becasue the lattice structure is broken so the attractions are weaker.