Softening hard water Practice exercise 3

A family in Kitale finds white deposits forming inside their kettle after boiling tap water for several days.a) What causes the white deposits?  (1 mark)b) Suggest a method they can use to prevent this from happening again.  (1 mark)

A student in a science club suggests using distillation at home to soften all the water used for washing and cooking.a) What is one advantage of using distillation to soften water? (1 mark)b) Give two reasons why this method may not be suitable for home use. (1 mark)

During a class experiment, students softened two samples of hard water using two methods: boiling and washing soda.a) Which method is more effective for removing both temporary and permanent hardness? (1 mark)b) Explain your answer. (1 mark)

Look at the diagram below showing a distillation setup. a) What is the function of the boiling flask and the condenser in this setup? (1 mark)b) Why is the water collected in the receiving flask free from hardness? (1 mark)

Look at the diagram below showing a distillation setup. a) What is the function of the boiling flask and the condenser in this setup? (1 mark)b) Why is the water collected in the receiving flask free from hardness? (1 mark)

Use the table below to help a learner choose the correct method to soften different types of hard water.  (2 marks) Type of hardness Suitable Method Temporary Hardness ? Permanent Hardness ?

Use the table below to help a learner choose the correct method to soften different types of hard water.  (2 marks) Type of hardness Suitable Method Temporary Hardness ? Permanent Hardness ?

A soap company wants to test how different water samples affect the performance of its new detergent. They wash stained cloth pieces using river water, borehole water, and rainwater. Only the cloth washed with rainwater becomes fully clean.a) What does this suggest about the hardness of the water samples?  (1 mark)b) How does hard water affect the performance of detergents? (1 mark)c) Suggest a softening method the company can apply before testing again with borehole water. (1 mark)

A student did a soap test on three types of water: rainwater, tap water, and borehole water. Rainwater formed lather easily, tap water formed little lather, and borehole water formed scum.a) Which of the three is softest and which is hardest? (1 mark)b) Suggest the type of hardness in tap water and borehole water. (1 mark)c) Propose one method to soften the borehole water.  (1 mark)

A student in a science club suggests using distillation at home to soften all the water used for washing and cooking. a) What is one advantage of using distillation to soften water?  (1 mark)b) Give two reasons why this method may not be suitable for home use. (1 mark)

Study the diagram showing a boiling and filtration setup used to soften hard water. a) Explain why filtration is done after boiling. (1 mark)b) Predict what would happen if filtration is skipped.  (1 mark)

Study the diagram showing a boiling and filtration setup used to soften hard water. a) Explain why filtration is done after boiling. (1 mark)b) Predict what would happen if filtration is skipped.  (1 mark)

Study the diagram below showing a boiling and filtration setup used to soften hard water. a) Explain why filtration is done after boiling. (1 mark)b) Predict what would happen if filtration is skipped.  (1 mark)

You are asked to recommend a water softening method for a boarding school located in a remote area with no electricity. The school wants a method that is effective, low-cost, and manageable with available resources.a) Which method would you recommend? (1 mark)b) Give two reasons for your choice. (1 mark)