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The solubility of a given solute in a given solvent typically depends on temperature. Depending on the nature of the solute the solubility may increase or decrease with temperature. For many solids dissolved in liquid water, the solubility increases with temperature up to 100 Â°C.
From the solubility curve, you can determine the solubility of a substance at any temperature between 0 and 100 degrees C. For example, what is the solubility of KNO3 at 0 degrees C? Around 13 g per 100 g water. What about at 50 degrees C? It is 80 g per 100 g water. So, the solubility of KNO3 increases more than six times between 0 and 50 degrees C.