Water Purification - Chemistry

WATER PURIFICATION

The water we use has been purified for us. Water from natural sources such as lakes and rivers contain a number of other substances, some of which can be harmful to our health.

• Dissolved ions – As water runs through and over the ground, it dissolves many chemicals from rocks which then become ions in the water. The most common ions found in natural water are sodium, calcium, magnesium, sulfate, chloride and hydrogencarbonate.
• Dissolved gases – Gases from our atmosphere can dissolve in water. The most important dissolved gases…