preview

Does Salt Affect Water Boiling Point?

Decent Essays

How does salt affect waters boiling point?

Prediction
I predict that adding salt will increase the waters boiling point because water boils when the molecules are able to overcome the pressure of the surrounding air to change from the liquid state to the gas state. For water to evaporate, the bonds between the molecules have to break. When salt is present, there are more bonds to be broken, therefore, more energy will be required to make the water evaporate Once you add a solute more heat energy is required for water to make the transition. (1)

Variables
We will keep the volume of water the same each time. This variable should be kept the same so that the test is fair. If the volume of water is different it would result in anomalies because of the different amounts of water, this would significantly affect the boiling point. The volume will be kept the same by measuring the amount of water put into the beaker each time with a measuring cylinder with small resolution to make sure that the volume is equal each time. If there was more water, the solution would be less saturated and that could lower the boiling point. Also, to collect precise results, you should keep the same flame on the Bunsen on, …show more content…

Then, fill 3 measuring cylinders with 100ml of water. Measure out 15g of salt, using a balance, into 3 containers. That means that there are 5g of salt per pour boat. Add one pour boat of salt to one beakerful of water. Stir the solution (2) and then heat it up using a Bunsen burner. Add a temperature probe and wait for the water to start boiling. You will know when the solution is boiling, as it will bubble and produce water vapour. Repeat this 2 more times and then 3 times for 10, 15, 20 and 25 grams. Using this method you will be able to collect accurate, precise and reliable results. This method provides us with precise and accurate results as we are using equipment with a smaller

Get Access