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Science Labs During SAS

By Dr. Rosemary Davidson, STEM Coordinator
One way our science students are carrying out laboratory experiments during School Away from School is through online simulations.

One site with a number of simulations is PhET Interactive Simulations which is provided free by the University of Colorado-Boulder. This site has physics, biology, chemistry, earth science and math simulations for elementary through university level.

Here are three examples of labs that our honors chemistry students are using as they explore solutions. For each there is a screen shot of the SIM, the description from PhET, and a link so that you can try the experiment yourself.

Watch your solution change color as you mix chemicals with water. Then check molarity with the concentration meter. What are all the ways you can change the concentration of your solution? Switch solutes to compare different chemicals and find out how concentrated you can go before you hit saturation!

Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt.

What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.

Keep PhET in mind if you have younger students at home looking for something to do!
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    • Concentration SIM

    • Sugar and Salt Solutions SIM

    • Soluble Salts SIM

St. Joseph’s Academy is a private, Catholic high school for girls in St. Louis, Missouri, sponsored by the Sisters of St. Joseph of Carondelet. Our mission is to provide quality Catholic education for young women in an environment that challenges them to grow in faith, knowledge, and respect for self and others. Our community expects these young women to make a profound impact in the world.

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