Take a sample of water from a well or bore-well in a beaker labelled ‘A’ and add some soap to it. Then take another sample of well water in a beaker labelled ‘B’. Add one spoonful of washing soda and stir. Then add some soap and stir again. 1) Is well-water hard or soft? Why? (1 mark) 2) What do you observe in beaker ‘A’? Why? (2 marks) 3) What do you observe in beaker ‘B’? Why? (2 marks) 4) Write a balanced chemical equation for chemical reaction in beaker ‘B’? (1 mark) 5) Why are detergents preferred over soaps for washing clothes in well water?
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