Ionic Compounds

Question 1

What is an Ionic Compound?

Answer 1

An ionic compound occurs when an negative ion joins with a positive ion.

Question 2

Ionic Lattice: the Arranged Sequence

Answer 2

The ions in an ionic compound are not randomly arranged. Instead, they have a regular, repeating arrangement called an Ionic Lattice, which formed due to the ions attracting each other and forming a regular pattern with an oppositely charged ions next to each other.

Question 3

Ionic Bonds

Answer 3

In the ionic lattice, the ions are held together by ionic bonds, which are strong as they have electrostatic force between oppositely charged ions.

Question 4

Properties of Ionic compounds

Answer 4

High melting and boiling points: lots of energy is needed to break the electrostatic forces, which means that ionic compounds are solid at room temperature.

Conductors: They can a only conduct electricity when in molten form or a solution as their charged ions are able to freely move. However as a sold, ions are not free to move and so are insulators as they cannot carry electricity

Question 5

Polyatomic Ions

Answer 5

Charged particle consisting of two or more atoms joined together

For example;

Ammonium - NH4+

Hydroxide - OH-

Nitrate - NO3-

Carbonate - CO3, 2-

Sulphate - SO4, 2-