Water Hardness

Syllabus tag: Kenya CBC | Grade 9 Integrated Science | Strand 1.0 Mixtures, Elements and Compounds | Sub-Strand 1.3 Water Hardness (14 Lessons)

Lesson objectives

By the end of this sub-strand, you should be able to:

• Describe the physical properties of water.
• Distinguish between hard and soft water and explain how hardness arises.
• Distinguish temporary from permanent hardness and describe methods of removing each.
• Discuss the advantages and disadvantages of hard water in daily life.