Water Hardness Practice exercise 1

A juice vendor in Nakuru complains that the bottled juices he prepares at home sometimes appear cloudy even though the ingredients are fresh. He uses water from a spring near his home. What could be the cause of the cloudiness and what advice would you give?  (2 marks)

A family in Eldoret finds their electric kettle stops working every few months. Examine how hard water could be responsible and suggest how they can protect their appliance without buying a new one.  (2 marks)

A family in Eldoret finds their electric kettle stops working every few months. Examine how hard water could be responsible and suggest how they can protect their appliance without buying a new one.  (2 marks)

A family in Eldoret finds their electric kettle stops working every few months. Examine how hard water could be responsible and suggest how they can protect their appliance without buying a new one.  (2 marks)

At home, Wanjiku uses rainwater for bathing and her sister uses tap water. Wanjiku's soap lathers more easily. Why is that?  (1 mark)

At home, Wanjiku uses rainwater for bathing and her sister uses tap water. Wanjiku's soap lathers more easily. Why is that?  (1 mark)

At home, Wanjiku uses rainwater for bathing and her sister uses tap water. Wanjiku's soap lathers more easily. Why is that?  (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)

A hospital laundry unit switches to soft water to save on detergent costs. However, patients on sodium-restricted diets are advised not to drink tap water from the hospital. Explain this situation using two relevant properties of soft water.  (2 marks)

A hospital laundry unit switches to soft water to save on detergent costs. However, patients on sodium-restricted diets are advised not to drink tap water from the hospital. Explain this situation using two relevant properties of soft water.  (2 marks)

A hospital laundry unit switches to soft water to save on detergent costs. However, patients on sodium-restricted diets are advised not to drink tap water from the hospital. Explain this situation using two relevant properties of soft water.  (2 marks)

Nakuru, an environmental officer notices wastewater from a softening unit draining directly into the garden. Discuss one environmental impact and one household benefit of soft water use in this case.  (2 marks)

Nakuru, an environmental officer notices wastewater from a softening unit draining directly into the garden. Discuss one environmental impact and one household benefit of soft water use in this case.  (2 marks)

Nashipae, an environmental officer notices wastewater from a softening unit draining directly into the garden. Discuss one environmental impact and one household benefit of soft water use in this case.  (2 marks)

Table: Source Analysis – Fig 2.5 Context SourceWater TypeExpected LatherSuitability for Cleaning Well (Fig 2.5)Hard WaterLowPoor RainwaterSoft WaterHighGood Why might the well water be unsuitable for cleaning?

boarding school in Kericho uses water from a nearby well  and also collects rainwater in tanks. The science teacher provides the following observations from a soap test: Source Water Type Expected Lather Suitability for Cleaning Well (Fig 2.5) Hard Water Low Poor Rainwater Soft Water High Good Why might the well water be unsuitable for washing clothes at the school?  (1 mark)

boarding school in Kericho uses water from a nearby well  and also collects rainwater in tanks. The science teacher provides the following observations from a soap test: Source Water Type Expected Lather Suitability for Cleaning Well (Fig 2.5) Hard Water Low Poor Rainwater Soft Water High Good Why might the well water be unsuitable for washing clothes at the school?  (1 mark)

boarding school in Kericho uses water from a nearby well  and also collects rainwater in tanks. The science teacher provides the following observations from a soap test. Why might the well water be unsuitable for washing clothes at the school?  (1 mark) Source Water Type Expected Lather Suitability for Cleaning Well (Fig 2.5) Hard Water Low Poor Rainwater Soft Water High Good

boarding school in Kericho uses water from a nearby well  and also collects rainwater in tanks. The science teacher provides the following observations from a soap test. Why might the well water be unsuitable for washing clothes at the school?  (1 mark) Source Water Type Expected Lather Suitability for Cleaning Well Hard Water Low Poor Rainwater Soft Water High Good

A car wash in Nakuru changed from hard water to soft water. What improvement would customers likely notice?

A car wash in Nakuru changed from hard water to soft water. What improvement would customers likely notice?  (1 mark)

A car wash in Nakuru changed from hard water to soft water. What improvement would customers likely notice?  (1 mark)

Pupils at a school in Kitui complain that the drinking water from the well tastes bitter. What is the likely cause?

Pupils at a school in Kitui complain that the drinking water from the well tastes bitter. What is the likely cause?  (1 mark)

Pupils at a school in Kitui complain that the drinking water from the well tastes bitter. What is the likely cause?  (1 mark)

Jane notices that she needs more soap to wash clothes when using borehole water than when using rainwater. What can she conclude?

Jane notices that she needs more soap to wash clothes when using borehole water than when using rainwater. What can she conclude?  (1 mark)

Jane notices that she needs more soap to wash clothes when using borehole water than when using rainwater. What can she conclude?  (1 mark)

Jane notices that she needs more soap to wash clothes when using borehole water than when using rainwater. What can she conclude?  (1 mark)

A laundry business in Nairobi notices frequent damage to its washing machines. An expert suggests switching from hard to soft water. What could be the most likely benefit of using soft water?

A laundry business in Nairobi notices frequent damage to its washing machines. An expert suggests switching from hard to soft water. What could be the most likely benefit of using soft water? (1 mark)

A laundry business in Nairobi notices frequent damage to its washing machines. An expert suggests switching from hard to soft water. What could be the most likely benefit of using soft water? (1 mark)

During a science experiment, a group added a teaspoon of sodium carbonate (washing soda) to hard water. After heating, they noticed a white solid settling at the bottom.Why did this happen?

During a science experiment, a group added a teaspoon of sodium carbonate (washing soda) to hard water. After heating, they noticed a white solid settling at the bottom. Why did this happen?  (1 mark)

During a science experiment, a group added a teaspoon of sodium carbonate (washing soda) to hard water. After heating, they noticed a white solid settling at the bottom. Why did this happen?  (1 mark)

Two learners washed their hands with different water samples. Their observations are recorded below: LearnerObservation with soap AThick foam formed BLittle foam, scum seen Which statement best explains the difference?

Two learners washed their hands with different water samples. Their observations are recorded below: Learner Observation with soap A Thick foam formed B Little foam, scum seen Which statement best explains the difference?  (1 mark)

Two learners washed their hands with different water samples. Their observations are recorded below: Learner Observation with soap A Thick foam formed B Little foam, scum seen Which statement best explains the difference?  (1 mark)

Two learners washed their hands with different water samples. Their observations are recorded below: Learner Observation with soap A Thick foam formed B Little foam, scum seen Which statement best explains the difference?  (1 mark)

Two learners washed their hands with different water samples. Their observations are recorded below. Which statement best explains the difference?  (1 mark) Learner Observation with soap A Thick foam formed B Little foam, scum seen

A boarding school matron notices that despite using enough detergent, the clothes appear grey and feel rough. What is the most likely cause?

A boarding school matron notices that despite using enough detergent, the clothes appear grey and feel rough. What is the most likely cause?  (1 mark)

A boarding school matron notices that despite using enough detergent, the clothes appear grey and feel rough. What is the most likely cause?  (1 mark)

A boarding school matron notices that despite using enough detergent, the clothes appear grey and feel rough. What is the most likely cause?  (1 mark)

An apartment complex in Nakuru spends a lot of money replacing blocked pipes and corroded taps. A consultant suggests using soft water. What is the likely outcome of following this advice?

An apartment complex in Nakuru spends a lot of money replacing blocked pipes and corroded taps. A consultant suggests using soft water. What is the likely outcome of following this advice? (1 mark)

An apartment complex in Nakuru spends a lot of money replacing blocked pipes and corroded taps. A consultant suggests using soft water. What is the likely outcome of following this advice? (1 mark)

A parent bathing their baby with hard water notices the child’s skin becoming dry and slightly irritated. What is the likely reason?

A parent bathing their baby with hard water notices the child’s skin becoming dry and slightly irritated. What is the likely reason? (1 mark)

A parent bathing their baby with hard water notices the child’s skin becoming dry and slightly irritated. What is the likely reason? (1 mark)

In a rural village, women complain that ugali takes unusually long to cook when using well water. What explains this?

In a rural village, women complain that ugali takes unusually long to cook when using well water. What explains this?  (1 mark)

In a rural village, women complain that ugali takes unusually long to cook when using well water. What explains this?  (1 mark)

In a school lab, students test porridge made with both hard and soft water. The one with hard water is thicker. What should they conclude?

In a school lab, students test porridge made with both hard and soft water. The one with hard water is thicker. What should they conclude?  (1 mark)

In a school lab, students test porridge made with both hard and soft water. The one with hard water is thicker. What should they conclude?  (1 mark)