A narrated screencast which illustrates the solubility rules of common ions. This lesson provides examples on how to determine if an ionic compound will dissociate in water. [5:17]

In this science activity, you will find out how much of a compound is too much to dissolve.

This StudyCard activity allows students to apply solubility rules to aqueous solutions. Students then determine whether the compounds are soluble or not in aqueous solution.

Students experience the engineering design process as they design, fabricate, test and redesign their own methods for encapsulation of a (hypothetical) new miracle drug. As if they are engineers, teams make large-size prototypes to test proof of concept. They use household materials (tape, paper towels, plastic wrap, weed-barrier fabric, glues, etc.) to attach a coating to a porous "shell" (a perforated plastic Wiffle® ball) containing the medicine (colored drink mix powder). The objective is to delay the drug release by a certain time and have a long release duration—patterned after the timed release requirements of many real-world pharmaceuticals that are released from a polymer shell via diffusion in the body. Guided by a worksheet, teams go through at least three design/test iterations, aiming to achieve a solution close to the target time release constraints.