2.2.5 Structures of Ionic Compounds Flashcards
1
Q
Why do ionic compounds have high melting and boiling points?
A
A large amount of energy is needed to break the strong electrostatic bonds that hold the oppositely charged ions together in a solid lattice.
2
Q
Why can ionic lattices not conduct when solid?
A
The ions are held in fixed positions and no ions can move.
3
Q
Why can ionic compounds conduct when melted or dissolved in water?
A
The solid lattice breaks down and the ions are free to move.
4
Q
Why are ionic compounds soluble in polar substances?
A
Polar molecules break down an ionic lattice by surrounding each ion to form a solution. The slight charges within the polar substance are able to attract the charged ions in the giant ionic lattice, This means the lattice is disrupted and ions are pulled out of it.
