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Interesting question and there's more than an obvious answer. The obvious answer is when the granules are no longer visible.

A less obvious answer is when the Tyndall Effect disappears, you have formed a solution. The Tyndall Effect describes the phenomenon in which white/visible light is scattered by very small particles suspended within the solvent. As the particles get smaller than the wavelength of visible light, they disappear.

This fits in with our picture of the dissolution process: bulk solid is infiltrated by solvent to form large areas of solid and voids of solution. Eventually the regions of pure solid shrink and we get totally solvated solute (a solution).

2006-08-02 03:30:37 · answer #1 · answered by ChemDoc 3 · 1 0

When something is dissolved, that means it has formed a solution. A solution is defined as a homogenous mixture of two or more substances that does not disperse light and will not separate over time (in a closed environment). One test you could to to determine if the salt is dissolved is to run electricity through it. Any ionic solution will conduct an electric current. If the salt is not dissolved, the water will not conduct the current as well (but will still conduct some because you are not using completely pure water so you will still have some electrolytes and metals in the water.

2006-08-02 11:21:04 · answer #2 · answered by embem171 4 · 0 0

You can say the salt is 'dissolved' when you can no longer see the salt by looking into the glass. You should be able to stir the water with a spoon or shake it up a bit and not see any difference in the water from top to bottom.

cheers,

2006-08-02 10:22:09 · answer #3 · answered by scotter98 3 · 0 0

Salt very readily dissolves in water. At concentrations below the solubility limit, dissolution does not take a long time. You can accelerate the process by using warm or hot water.

2006-08-02 10:19:04 · answer #4 · answered by cherox 3 · 0 0

Combine salt and water, measure the specific gravity of the liquid. When the specific gravity of the liquid increases proportionately to the amount of salt dissolved.

2006-08-02 10:39:33 · answer #5 · answered by hydrasire 2 · 0 0

Salt is dissolved in water when water looks clear & taste of water is not sweet or there is some taste to water.

2006-08-02 10:19:35 · answer #6 · answered by Anonymous · 0 0

When the water is not 'grainy' anymore.

2006-08-02 10:15:55 · answer #7 · answered by crazy nana 3 · 0 0

when it disappears

2006-08-02 12:32:02 · answer #8 · answered by shiara_blade 6 · 0 0

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