Question

How would you confirm that a colourles liquid given to you is pure water?

Answer 1

Take a sample of colourless liquid and put on stove if it starts boiling exactly at 100 degree C then it is pure water. Any other colourless liquid such as vinegar always have different boiling point. Also observe carefully that after some time whole liquid will convert into vapour without leaving any residue.

We can check it by checking reactivity with some metals that reacts violently with water.

Good morning

have a nice day!

Answer 2

• The boiling point and freezing point of the given liquid comes out to be 100°C or 373 K and 0°C or 273 K respectively
• Under one atmospheric pressure
• It confirms that the given liquid is pure water.