How can you prepare an unsaturated solution of salt

You can prepare an unsaturated solution of salt in water simply by dissolving a small amount of salt in a given amount of water. For example a salt solution prepared by dissolving 1 tablespoon of salt in 1 glass of water will be unsaturated. A solution is unsaturated till the time it can dissolve more of solute in a given quantity of solvent at constant temperature. When no more of solute can be dissolved in the solution at the same temperature it becomes saturated. 

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