SHS-2 Syllabus – Water

1.3.2 distinguish between hard and soft water.

Advantages and disadvantages of hard and soft water.

refer to JHS syllabus for a review of sources of water, physical and chemical properties of water and the treatment of hard and soft water.

perform experiments to investigate properties of water:
(i) demonstrate the solvent action of water on a variety of substances.
(ii) determine the presence of dissolved substances in some sources of water
(iii) demonstrate the polar nature of water.
NOTE: discussion should include uses of water.

collect water from different sources and determine their hardness using the same brand of soap.

discuss the advantages and the disadvantages of hard and soft water.

Explain what an aqueous solution is and give three examples.

Name two compounds which cause permanent hardness of water and two compounds which cause temporary hardness of water.

Name two advantages and two disadvantages of hard and soft water.

1.3.3 demonstrate how to soften water.

demonstrate through an activity any one of the following processes to soften hard water: addition of washing soda, ion exchange, boiling and distillation.

1.3.4 describe the steps involved in the treatment of water for public consumption.

draw a flow chart to show the steps involved in the treatment of water for public consumption

discuss the importance of water as well as the role of the Ghana Water Company in public water supply.

PROJECTS:
1. Organise a visit to local water treatment plant and write a report on the visit.
2. Design water filtration system using charcoal.

Describe one method by which hard water can be softened.

Perennial water shortage and frequent disruptions in water supply in most communities in Ghana can be traced to erosion of human values. Discuss.

Outline the role of Ghana Water Company in the control of water supplies in cities, towns and villages.

List two significance of the use of charcoal in filtering water.

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