Climate Graph

PLAN:

Aim: To find how the gradual addition of salt affects the boiling point of water,
and furthermore to find out how different solutes affect the boiling point of water.

Hypothesis: The addition of solutes to boiling water will cause the temperature of the water to rise and boil at higher temperatures.

Method:
1. One litre of water was boiled on the stove.
2. The highest temperature of the boiling water was recorded, using a thermometer.
3. 5 grams of salt was measured on the accurate scale (c. 1 d.p).
4. The salt was added to the boiling water and the solution was stirred.
5. The temperature of the solution of the boiling water and salt was measured and the highest temperature reading was recorded.
6. Steps 3-5 were repeated 3 times, progressively recording results.
7. Steps 1-6 were repeated, replacing salt with sugar and then bicarbonate soda.
8. Steps 1-7 were repeated 5 times.

SRP planning

ok, so i've been thinking about it. I have decided that I might do- instead of just how salt affects water, it will be how different compounds e.g. salt, sugar, baking soda and maybe others- im in the process of working it out. I will do the experiment at home and i've done some research and it shows that generally, they should raise the boiling point of water but for some reason, baking soda seems to decrease the temperature. I am interested in finding out why. I'll do some more research and post the method for my SRP soon.