![]() Obviously, a solubility curve shows you the solubility of a substance at a particular temperature. For others (like sodium chloride), there is only a small change in solubility with temperature. For some (like potassium nitrate), the increase is quite fast. A solution is saturated if it will not dissolve any more of the salt at that particular temperature - in the presence of crystals of the salt.įor most, but not all, substances, solubility increases with temperature. The solubility is often (although not always) measured as the mass of salt which would saturate 100 grams of water at a particular temperature. It includes a brief discussion of solubility curves.Ī solubility curve shows how the solubility of a salt like sodium chloride or potassium nitrate varies with temperature. This page looks at the phase diagram for mixtures of salt and water - how the diagram is built up, and how to interpret it. Cooling salt solution more concentrated than the eutectic composition.Cooling salt solution more dilute than the eutectic composition. ![]() ![]() Cooling salt solution with the eutectic composition.The phase diagram for sodium chloride solution.
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