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.