How can you know that a colorless liquid is pure water?

Answer 1

The best method would probably to use universal indicator to determine its pH. If the paper turns green, the solution is neutral and probably water.

You could also try mixing the unknown substance with another two liquids, one of which has a lower density than water say toluene, and another that has a higher density than water. Water will float above the more dense liquid and below the less dense liquid.

Answer 2

Smell it cautiously. If no smell, then have a really good smell. Then do Gas Chromatography and Flame Emmision spectroscopy. Those techniques will confirm water. Very pure water will also have very low conductivity - so that would also be a good test.

Answer 3

There are many ways to prove that water is pure, but the most accurate way is to test its electrical resistivity. Ultrahigh purity water is often called 18 mega-ohm water, which arises from its resistivity.

Answer 4

By checking the boiling point of the substance. Pure substances have a distinct boiling point while impure substances boils over a range of temperatures. One way is through distillation.

Answer 5

One needs a lot of chemical analysis to assure water is pure, i.e. zero impurities! One quite easy accurate test is the freezing point measurement with an accurate 0.001 oC thermometer

Answer 6

i don t know the answer

Answer 7

Why the colourless liquid is not water

Answer 8

drink it