The fact that the solution does not absorb any one wavelength of visible light more than any other such wavelength.
Depends of the salt in solution. The sodium chloride solution is colourless, the uranyl nitrate solution is yellow, etc.
Colorless
A solution can still contain color, but also be clear. Take a pool for example, the water is slightly blue but you can still see through it. A colorless solution is when there is no color, like water in a store bought water bottle.
A solution of K2SO4, which is potassium sulfate, is typically colorless.
If pure, colorless.
Depends of the salt in solution. The sodium chloride solution is colourless, the uranyl nitrate solution is yellow, etc.
Salt added to water form a solution, an electrolyte.
Generally the appearance is that of a dusty substance, the colour changes depending on the acidity of the solution when it was in its liquid form and if an indicator was used, usually it is white and dusty. :)
Colorless
A solution can still contain color, but also be clear. Take a pool for example, the water is slightly blue but you can still see through it. A colorless solution is when there is no color, like water in a store bought water bottle.
A solution of K2SO4, which is potassium sulfate, is typically colorless.
If pure, colorless.
common salt in water (liquid)is colorless/when melts its colorless again.
Al2SO43 is colorless in a water solution.
Zinc sulfate is colorless to white in appearance.
Its Colorless
Water is usually a colorless liquid.