There are two types of hard water. Temporary and permanent, true or false?
The hardness of water is caused by ions and ions. Hard water contains a massive amount of and ions. These are added to the water when rain falls onto rocks such as . Compounds in the rocks such as and are into the water.
Select an advantage of hard water.
It is less expensive than soft water.
More readily available than soft water.
Good for teeth and bones.
Rainwater is an solution which with limestone. The solution formed in the lake is known as . One advantage of drinking the water from the lake is that it better than rainwater.
what is the name of the process used to remove solid particles from water to make it safe to drink.
Crystallisation
Filtration
cleansing
Fluoride is added to the water to sterilise it.
An ❌ is used to soften hard water. The column contains ❌ which are positively charged. However, calcium and magnesium ions have a ❌ and therefore ❌ the sodium ions. The sodium is soluable so it will then ❌ into the water.
