Question

how would you confirm that a colourless liquid given to you is pure water?

Answer 1

Pure water has a fixed boiling point of 100° C. This fact can be used to confirm that a colourless liquid given to us is water.

Take the colourless liquid in a distillation flask fitted with the thermometer. Heat the flask till the liquid starts boiling. If all the colourless liquid boils off at the same temperature of 100° C without leaving behind any Residue in the distillation flask it will be pure water.

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Hope this will help you.....

Answer 2

pure water has a fixed boiling point which helps us to confirm .