How do you test for PURE water?

Question

You are given a beacker labbeled pure water. How can you test to see if the water inside is what the label says?

Answer 1

This can be simple if done correctly. "Pure" water is a reference to distilled water. If you pass a electrical charge through a sample of the water, and it appears to be conductive, it could be observed that the water is not pure as pure, distilled water does not conduct electricity well as it does not contain any metal ions (as tap water does). Non-conductive water is pure, or distilled water

Answer 2

Test For Pure Water

Answer 3

First, distilled water is not pure water. Any chemist knows this. However, the previous answer is quite correct about dissolved salts. Salts (or electrolytes) conduct electricity. Attempt to pass an electric current through the water. No electric current, no dissolved salts. But this won't answer about dissolved covalent compounds. To determine this, boil the water. Taking into account elevation, the water should boil at exactly 100 degrees C at sea level. If it boils higher, there are covalent impurities (like sugars).

Hope this helps.

Answer 4

Water is never "pure". It is graded based on certain features.

The common measurements made are for
1) electrical conductance - the lower the conductance the less ions in the water
2) carbon content

Answer 5

take it oot ta thae clube and shiv it wi a spork. Tak yer m9s ootae nandos an drink it wi a buket o chicken an if ye dinnae get aids is pure as fok

Answer 6

Test for physical properties. Boiling and melting point will be the easiest to do. Density too.

Compare your result to the "theoretical" ones

Answer 7

See if it boils at 100 degrees Celcius and freezes at 0 degrees Celcius at standard atmospheric pressure (760 mmHg).

Answer 8

Test for boiling temperature.
Test for electricity conductivity
Test for the melting point temperature