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Experiment to show the removal of hardness by washing soda. |
Answer» Materials required : 1. beaker 2. glass rod 3. washing soda 4. hard water Take some hard water in a beaker, and add a small quantity of washing soda to it stir it with a glass rod. Allow the insoluble carbonates to settle down or precipitate. Filter or decant the liquid. Water so obtained is soft water. But it is unfit for drinking as it contains an excess of washing soda and excess of sodium salts. |
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