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 ...