You are given three test tubes. The three test tubes contain distilled water, the acidic solution and the basic solution respectively. There is only red litmus paper available in order to identify what is there in each test tube. How will you find out what is in each of the test tubes?

Asked by Shivani Kumari | 2 years ago |  321

1 Answer

Solution :-

We can identify the content in each of the tubes using red litmus paper. This can be done by noticing the colour change of the red litmus paper.

On litmus paper, the three solutions in the test tubes are poured separately.

The solution which turns red litmus to blue contains a basic solution.

Divide the formed blue litmus paper into two parts.

The solution from the best tube which turns blue litmus paper to red will be the acidic solution.

Solution of the test tube which do not change either red or blue litmus paper contain water.

NOTE: After immediate distillation, distilled water has a pH of 7. However, just within a few hours after distillation, it absorbs carbon dioxide from the atmosphere and turns slightly acidic with a pH of 5.8.

Answered by Vishal kumar | 2 years ago

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