The Chem II students use differences in freezing point depression of
three unknown water solutions A, B and C to determine which of the
solutions contain sodium chloride, calcium chloride, and sucrose as the
solute, in this lab exercise presented by Mr. Nowak. Once that is determined they will be able to calculate the
molality of each solution from the data they collected. The students do
know that each solution has the same concentration.
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| James and Bailie use temperature probes to determine the temperature of three unknown solutions as they approach their freezing points, as Matthew and Jordan look on. |
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| Kenny and Max look on as Mr. Nowak checks their set up. |
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| Alina, Malika and Tatiana decided to use three separate ice baths to bring their solutions down to their freezing points, as Professor Maitland observes their technique during her classroom visit. |
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| The Labques2t Tablet indicates each of the three probes using a different background color. The probes are showing the temperatures of the three solutions (A, B and C) as they approach their freezing points. |
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