How could you determine if a clear colorless liquid has dissolved table salt in it?

Answer 1

Let the liquid evaporate. If there is a residue (white), then your liquid was likely the salt soln. This would only work if you are dealing with the two options (pure water or salt soln.)

Salt water will also conduct electricity better, it has a greater density and it will refract light more than pure water.

Answer 2

Rig up two electrodes and clamp them so that they can't move apart or together. Put them into a bowl of pure water and measure what current, if any, passes between them when connected to a battery and ammeter. Then take the electrodes out and put them in the liquid to be tested. If it's a salt solution more current will flow.

The reason more current will flow if there is a solution is that the dissolved salt dissociates into positive and negative ions and these ions move towards one or the other electrode. This effevctively is the current that you're measuring.

Answer 3

You could taste a small drop of the liquid to see if it tastes salty. Alternatively, you could use a conductivity tester to check if the liquid conducts electricity, which would indicate the presence of dissolved ions like those found in salt. Another method is to use a refractometer to measure the refractive index of the liquid, which can change when salt is dissolved in it.

Answer 4

Can not tell without tasting (or a chemical test).

Answer 5

You can tell from its density of freezing/boiling point.

Answer 6

you put it through filter paper and is you can see a murky layer there is salt in the filter paper

Answer 7

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