Experiment 14


To determine the solubility of a given salt at room temperature and also to draw its solubility curve.


Thermostat, beakers, stirrer, thermometer etc.


The solubility of the salt is determined by preparing its saturated solution at a number of temperatures, and then a curve is plotted between the solubility as ordinate and temperature as abscissa.


Take about 50 ml of distilled water in a beaker and add to it some amount of the given salt, say KCl and stir the contents. Now, heat the solution to about 85–90 °C and go on adding a large amount of the salt. Please note that the salt should be in excess at 85–90 °C. Now, cool the solution and as the temperature falls to say 80 °C, pipette out about 4–5 ...

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