ICSE Class 8 Chemistry, Unit 8: Water
From the CISCE curriculum. 12 key concepts, about 4 days of study at 20 to 30 minutes a day.
What this unit aims at
Water is the one of the most important resources and is a universal solvent. Children will know and understand that water is important for all living beings (animals, human beings, plants and trees), comes from different sources and has many uses. There are different sources of water such as sea, well, river, lake, pond, rain. We use it daily for washing, bathing, drinking and in industries. Water helps in controlling the temperature of the atmosphere.
Your child should be able to
- describe that water dissolves many substances and it is a universal solvent
- identify a solution, suspension and colloid on the basis of properties
- state the differences between saturated, unsaturated and supersaturated solutions
- describe water of crystallization
- write equations of metals with cold water and steam
- describe hard and soft water
- discuss the different methods of softening of water
Key concepts in this unit
- Dissolution of salts in water
- – meaning and explanation.
- Universal solvent – meaning.
- Solutions, suspensions, colloids.
- Differentiate unsaturated/saturated and supersaturated solutions.
- Suspensions and colloids.
- Water of crystallisation.
- Hydrated and Anhydrous substances, hygroscopic.
- Reactivity of metals with cold water, hot water and steam (with products formed).
- Hard and soft water and methods of softening of hard water.
- Disadvantage of using hard water.
- Removing hardness of water by boiling or by treating with washing soda.
Teach this unit at home
- A day-by-day plan from the CISCE concepts, so you know what to cover each day.
- A step-by-step script for each day, so you know what to say and ask (AI-written from the CISCE curriculum, so check it against your child's school book).
- A quiz at the end.
From the CISCE Curriculum for Classes I to VIII (2016). CISCE sets what is taught, not the textbooks, so schools use different books and there are no page numbers here. Adhian Gurus is not affiliated with CISCE.