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Aim: Our aim is to find out and investigate the boiling temperatures of water and water with impurities.

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Introduction

*BoiLiNg TeMperATurEs* Aim: Our aim is to find out and investigate the boiling temperatures of water and water with impurities. Hypothesis: My prediction is that the impurities will boil at a higher temperature than the water, or the normal water boiling temperature of a 100 degrees Celsius. I think the reason why is simply because, the impurities are solids so it will boil at a higher temperature than water, since it is already a liquid! Apparatus: Sugar Salt Cornstarch Baking soda Food coloring (3 colors) 4 small beakers 4 normal-size beakers Spatula Thermometers Measuring cylinder Bunsen burner Gauze mat Tripod Water (amount in the method!) Safety goggles Ice tray Variables: Amount of the Impurities Amount of water used Temperature of which the impurities was in Color of the flame used The sate of which the impurities was in after refrigerated, whether frozen or not. Method: First of all, gather together these four impurities: Sugar, Salt, Cornstarch and Baking soda. ...read more.

Middle

Get an ice tray... Pour these four mixtures into separate boxes of the ice tray! Put the tray into to the refrigerator and leave it over night to freeze, until it can't freeze anymore. Now the impurities are frozen! Get a normal-size beaker and fill it with 50 mL of water, with a spatula take out the Sugar ice cube and but it into a smaller beaker then put that small beaker into the normal-size beaker...put a thermometer inside the small beaker and heat until it starts boiling. Follow this same procedure for the rest of the 3 impurities, starting from "get a normal-size beaker" till - "until it starts boiling"!! Use blue flame for boiling! Make observations on the temperature when the impurities start to boil... Results: SugAr SaLt BaKIng SodA CoRnStArCh BoiLiNg PoInt 93 degrees Doesn't boil 70 degrees Doesn't boil Analysis of Results: The table above shows that these some of these impurities doesn't even boil... ...read more.

Conclusion

This error could have made the beaker blast if we left it on longer (too much heat) so in this case, we were lucky. This was a major error! The other error we made, but wasn't a very big impact on the experiment was that some of the ice cubes started melting a bit before we actually started boiling it. So, in the end, we did learn from our unwise mistakes... Improvements and Extensions: To further improve this experiment by redoing it again, I will have quicker reflexes to not let the ice cube melt before I boil it, and now that I've learnt from my mistake, I won't make the mistake of not putting the impurity mixture ice cube in the small beaker and then into a normal-size beaker containing 50 mL of water! I will further extend this experiment by freezing these impurities and comparing it to the temperature water freezes in! :):):):):):):):):):):):):) SuPriYa NarULa 9B DSm SciEncE - LHa ...read more.

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