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# How the solubility of potassium chlorate (KClO3) changes as the temperature changes

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Introduction

Apparatus: Bunsen Burner, tripod, gauze, safety glasses, heat resistance mat, a boiling tube, a thermometer, a pipette, a burette, two-glass beakers, a test tube rack, two grams of Potassium chlorate. Safety Measures: Wear safety goggles and aprons in the lab at all times. When doing the experiment stand up, do not sit. Use caution in dealing with chemicals. Hot boiling tubes and beakers can cause burns. Do not move around the lab during the experiment; stay at your workstation. Solubility: The solubility of a solute in a solvent at a given temperature is the number of grams of that solute which can dissolve in 100g of solvent to produce a saturated solution at that temperature. ...read more.

Middle

* Add another 4cm3 distilled water from the burette to the boiling tube and again allow the boiling tube of KClO3 to dissolve in the boiling water bath. As before remove the boiling tube and stir the contents with the thermometer and record the temperature at which the first KClO3 crystals reappear. * Repeat this step another three times using the same boiling tube. * Then take another boiling tube and add 2 grams of potassium chlorate and repeat the whole experiment in the same way to obtain a second set of results. Calculations: Solubility (g/100g of water) = Mass of solute (g) *100 Mass of water (g) ...read more.

Conclusion

By using accurate apparatus like the burette and thermometer I believe that I have obtained reliable results. By also repeating the experiment to get a second set of results and finding the average this has also made my results reliable. From the graph I can clearly see it is a solubility curve as it should be and I have drawn a line of best fit to suit my results. There are also other experiments that could be done to obtain results for the solubility of potassium chlorate and surely the same conclusion would be drawn up. But I think that the experiment I did was accurate and reliable enough. Obtaining evidence Liam Brogan S1F ...read more.

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