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- Grade Range
- 9th - 12th
- Rating
Students experiment with cubes of agar and sodium hydroxide and discover that the smallest cube has the largest surface area to volume ratio (SA:VOL). Full Review »
- Grade Range
- 9th - 12th
- Rating
Students experiment with titration of acid and alkaline solutions. They watch a demonstration and measure the acidity, or alkalinity of a liquid. They read signed numbers on the titration device and beaker and discuss the importance of signed numbers. Full Review »
- Grade Range
- 7th - 8th
- Rating
Students brainstorm different information they know about the AIDS virus and how it is spread. They use sodium hydroxide and phenolphthalein to simulate how quickly the AIDS virus is spread. Full Review »
- Grade Range
- 6th - 8th
- Rating
Students participate in a simulation of how diseases are transmitted. Each student holds a test tube, with only one containing the "disease" while the others have water. They move around the room until told to stop. Using droppers to place some of their solution into their neighbor's tube, they are spreading the disease. Finally, they try to determine the original source of the infection. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students complete this experiment in two weeks. During the first lab period, students determine the conditions for a precise, reproducible titration of a brine solution with sodium hydroxide and the indicator, phenolphthalein. During the second week, students titrate pickle juice. They need to solve the problem of the interfering color of the pickles and decide if a more dilute solution of sodium hydroxide would be appropriate. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students titrate a sample of fatty acids with standardized sodium hydroxide solution. From the amount of base needed for neutralization and the mass of sample used for titration, the apparent average molar mass of the sample is determined. Students use their results to determine whether or not their sample matched the fatty acid ratio best suited for soap making. Full Review »
- Grade Range
- 11th
- Rating
Students work with a variety of solutions to determine which combinations will create a precipitate when mixed with another. They complete a chart with their predictions and results. When students finish the lab, they discuss the results and their successes and failures in predicting the precipitates. Full Review »
- Grade Range
- Higher Ed
- Rating
Students prepare a synthetic elastomer called Thiokol. This polysulfide is the first synthetic rubber produced by Dr. Joesph C. Patrick in the 1920s. Pupils synthesize this material by combining an alkylene dichloride and sodium polysulfide. Full Review »
- Grade Range
- 10th - 11th
- Rating
Students participate in a high school enrichment course that exposes them to different chemical instrumentation used in industry labs in a series of hands on activities. Guide includes seven enrichment activities with instructor notes. Full Review »
- Grade Range
- 7th - 8th
- Rating
Students utilize a CO2 probe to determine the various levels of concentration of Carbon Dioxide. They collect samples of Carbon Dioxide in their school to locate the highest concentration. They create a class chart to record the data collected. Full Review »
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