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A student dipped a strip of pH paper in ...

A student dipped a strip of pH paper in distilled water taken in a tube. As expected, the pH paper acquired green colour. He then dissolved a pinch of common salt in the same tube. What will be the expected change in colour of the pH paper ?

Text Solution

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There will not be any change in the colour of the pH paper. It will remain green which indicates that the solution has mintained neutral charcter. Actually, sodium chloride is a salt prepered from strong base (NaOH) and strong acid (HCl). It is a neutral salt and is not expected to bring any change in the pH of distilled water.
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