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)
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Explanation:
it is soft water now because washing soda is used to remove the hardness of water.....
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