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General Chemistry Science Fair Project

The Effects of Salt and Sugar on Water

The Effects of Salt and Sugar on Water | Science Fair Projects | STEM Projects
In this project, you'll explore the effects of salt and sugar on the freezing point of water. You'll measure the temperature of the solution and observe how the freezing point changes when salt or sugar is added.


The hypothesis is that the freezing point of water will be lowered when sugar or salt is added.

Method & Materials

You will mix salt and sugar into water, pour the solution into ice cube trays, and place the trays in a freezer. You will label 8 beakers and test tubes, prepare 8 varieties of solution, and fill a basin with ice cubes. You will pour the solution into the test tubes, place the test tubes in the ice bath, and observe when the first ice crystals start to form.
You will need 1 packet of sugar, 1 packet of salt, 800ml of distilled water, 8 test tubes, 8 beakers, 1 basin, tap water, 1 freezer, ice cube trays, 8 thermometers, 1 digital weighing scale, and 1 black marker.


The results show that adding more sugar or salt to the solution will lower its freezing point. The hypothesis that a higher salt or sugar content in water will lower its freezing point has been proven to be true.

Why do this project?

This science project is interesting because it explores the concept of freezing point depression, which is useful in applications where water needs to be kept liquid, especially in the use of antifreeze in combustion engines operating at freezing temperatures.

Also Consider

Variations of this science project include comparing the effects of salt and sugar on the boiling point of water, and repeating the experiment using a different solvent, like alcohol or thinner.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

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