Frozen Salt
Grade Levels:
7-9
7-9
Question:
Does adding salt to water lower its freezing point?
Does adding salt to water lower its freezing point?
Possible Hypothesis:
Adding salt does/does not lower the freezing point of water.
Adding salt does/does not lower the freezing point of water.
Materials:
Four 8-ounce plastic cups
Measuring cup
Box of table salt (sodium chloride)
Freezer
Thermometer
Teaspoon
Four 8-ounce plastic cups
Measuring cup
Box of table salt (sodium chloride)
Freezer
Thermometer
Teaspoon
Procedure:
- Fill four cups with six ounces each of tap water. Add a teaspoon of salt to one cup, two teaspoons to another, and three teaspoons to a third. Leave the fourth as your control.
- Place the cups in the freezer. Observe the cups periodically until a thin layer of ice forms on the top of the water, and then record the temperature of each cup.
- Record your observations.
Analysis and Conclusion:
Did adding salt lower the freezing temperature of the water? What was the effect of adding more salt to the water? Can you think of ways that this knowledge can be put to work for you?
Did adding salt lower the freezing temperature of the water? What was the effect of adding more salt to the water? Can you think of ways that this knowledge can be put to work for you?
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scienceproject44.blogspot.com provides the Science Fair Project Ideas for informational purposes only. scienceproject44.blogspot.com does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against Education.com that arise thereof. In addition, your access to Education.com's website and Science Fair Project Ideas is covered by scienceproject44.blogspot.com's Privacy Policy and site Terms of Use, which include limitations on scienceproject44.blogspot.com's liability.Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.
so nice post
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