If crystals actually formed, it is probably because the water cooled down. The amount of salt dissolved exceeded the amount that could be dissolved in the water, and the salt crystallized out of solution. This seems very unlikely with the amount you give though - wikipedia cites a solubility of about 18g salt per 50mL water at room temperature.
However, what you are describing sounds more like there was a layer of more concentrated salt solution on the bottom. This will show up as a waviness at the bottom, like how stuff looks distorted when viewed through hot air. This occurs because more concentrated salt solutions have a higher density and higher refractive index than water. Thoroughly mixing the water should mix the layers, and the waves should go away.If salt is soluble in water, why can you see a layer of dissolved salt at the bottom of a beaker?
The hot water will dissolve more salt than cool water.
When hot, it is not a saturated solution if salt deposits can't be seen.
As the water cools, and salt crystals form on the bottom, the solution is Super-saturated and, on cooling it can't keep the same amount of salt in solution...it drops out as semi-solid and solid crystals.
the mixture is a saturate solution and what your seeing is excess salt. Im not sure what the ratio is but water can only contain so much salt. after that the rest cannot dissolve and would clump at the bottom
The solution could be saturated, meaning that the maximum amount of salt has already dissolved into solution. The salt layer at the bottom is excess that did not dissolve.
Is the water still hot?
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