Chemistry

How are nutrients transported through the roots of plants? Why do cucumbers shrivel up to pickles when placed in a salt solution? Why does adding antifreeze to water keep it from freezing at 0 ºC? This unique kit provides a complete lesson plan for a...

Students will use acid/base titrations to determine the concentration of unknown acid and base solutions in this laboratory activity. First, students will determine the concentration of an unknown hydrochloric acid solution by titrating with a THAM s...

Equilibrium and equilibrium constant calculations often confuse students. Use this microscale experiment to help students understand the relationship between the equilibrium constant and solubility. Students prepare serial dilutions of calcium nitrat...

Why is it that some solids take so much longer to dissolve than others? What factors affect the rate at which a solute dissolves in solution? In this laboratory activity, students will investigate the effects of stirring, temperature, surface area, a...

“Oil and water do not mix.” This old saying is often used to explain why relationships between opposites are difficult or almost impossible. In this experiment, students trace this saying back to its source-the nature of oil and water, solutes and so...

Break out your inner Picasso! In this “Marbling Paper” lab activity, students will apply the concepts of intermolecular forces, surface tension, solubility, and viscosity to an age-old craft. Utilizing painters’ inks diluted with natural, nontoxic pa...

All nitrates are soluble! Most hydroxides are insoluble! Rather than memorizing solubility rules such as this, students investigate precipitation reactions and then develop their own general rules of solubility-exactly what the National Science Stand...

When should students learn how accurate concentrations of solutions are prepared? This year! This detailed laboratory procedure walks students step-by-step through the process of accurately preparing solutions of various concentrations. Students must...

The perfect lab activity for students to learn about solubility, solubility curves, saturated solutions, and saturation temperature. The solubility of compounds in water can vary widely with temperature. In many cases, “rules” do not apply to solubil...