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Acids, bases and salt
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04/09/2021 10:08 am
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You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
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04/09/2021 10:09 am
Take a small volume of all three liquids in three different test tubes. Dip red litmus paper strips separately in all the three test tubes. The tube in which red litmus strip turns blue, contains a basic solution. Now, we use the blue litmus paper as testing paper and dip it into the remaining two solutions. The solution which changes the colour of the blue litmus paper into red is acidic and the other which does not affect it, is neutral, i.e. distilled water.