HARD AND SOFT WATER

The ions that cause hard water are;

• Calcium and Manganese ions

• Calcium and Magnesium ions

• Carbon and Magnesium ions

• Carbon and Manganese ions

Soft water is water that;

• Does not lather
• Lathers with difficulty
• Lathers easily
• Does not form bubbles

Which one of the following is NOT a property of hard water?

• It lathers easily with soap solution

• It is good for the brewing industry

• It causes limescale in kettles

• It has a nice taste

Permanent hardness in water is caused by the presence of:

• Calcium bicarbonate

• Magnesium sulphates

• Both of them

• None of them

water suitable for cooking, bathing and laundry is

• soft water

• hard water