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You are provided with two samples of har...

You are provided with two samples of hard water, one containing temporary hardness and the other permanent hardness. Without the help of any chemical, how will you identify the nature of the sample.

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Boil the two samples separately in beakers for sometime. If precipitate appears, filter it out. Now, add a strip of soap in each. The one which produces lather contained temporary hardness while the other in which no lather is formed, contained permanent hardness.
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