Determination of Chemical Formulas

In this activity students combine different ratios of several chemical solutions and observe similarities and differences in the appearance and amount of precipitate formed. Students then use their results to determine which elements are in the same family of elements and to predict the chemical formulae for the precipitates.

According to Le Chatelier's Principle, if stress is applied to any system of reactions at equilibrium, the equilibrium will adjust or shift itself in such a direction so as to reduce the effect (or relieve the stress) of any change in conditions. In this series of activities, students put Le Chatelier's Principle...

This is a two-part investigation into the chemical concepts that underlie corrosion and our attempts to inhibit it. In the laboratory portion of this activity, students investigate the corrosion of iron, steel, aluminum, and zinc metal. They investigate the impact of factors such as salinity, coatings, and contact with other metals on rust and...

In this kit, students are asked to identify common metallic and non-metallic ions in zinc, cadmium, antimony, barium, sulfate, sulfide, sulfite, and carbonate. Through the identification process, students learn that each substance has distinctive properties. As a closing activity, students conduct chemical tests on four unknown substances. All test results are safe, clear, colorful,...

A very important outcome of studying science is to acquire the ability to make and interpret observations. Students initially observe and describe seven different solutions. They then combine pairs of these chemical solutions and use their observations to determine whether or not a chemical reaction took place. Finally, they test an unknown solution and...

In this activity, students observe various acid and base reactions. They observe the effect of acids and bases on the chemical indicators litmus and phenolphthalein. They also observe that not all metals react equally with acids and not all acids, even those with the same concentration, react equally with metals. Students also collect and...

In this very popular Applied Science Concept Kit, students perform a series of very colorful tests that help them to develop a better understanding of pH, and its relationship to acids and bases, and its effect on indicator dyes. Using a LAB-AIDS® Chemplates® and universal indicator, each student creates his own pH...