Chemistry

AP Requirement: #3-Determination of the Molar Mass by Vapor Density.   The molar masses of specific gases are found by comparing masses of equal volumes of gases at the same temperature and pressure. Oxygen gas is selected as a standard and mo...

AP requirement: #12-Determination of the Rate of a Reaction and Its Order. A microscale laboratory consisting of a comprehensive, quantitative kinetics activity. Students study the kinetics of a clock reaction involving the oxidation of iodide ion b...

AP Requirements: #14-Separation and Qualitative Analysis of Cations and Anions.   In this semi-microscale laboratory, students analyze two solution sets of four cations and four anions. For each set, a specific qualitative scheme is followed t...

AP Requirement: #21-Measurements Using Electrochemical Cells and Electroplating. A microscale series of half-cells is constructed by placing a piece of metal into a solution of the metal's ions. The half-cells are connected by a salt bridge and the ...

Investigate the chemistry behind an exciting “popping” toy. A chemical reaction within a sealed bag rapidly produces carbon dioxide gas, expanding until the bag breaks with a loud pop that will grab even your most inattentive student's interest! Stud...

Roses are red, violets are blue-or are they? Red roses, as well as many other flowers and fruits, contain natural indicators that are sensitive to acids and bases. The color of a natural acid-base indicator depends on pH. In this activity, the pH sca...

Solve the acid and base mystery. Through deductive reasoning and microscale titrations, students learn the identity and concentrations of the four acid and base solutions. This guided-inquiry experiment can be adapted for various levels of students a...

Chemical change is a central part of our modern world. Although it is responsible for most of the energy, materials, and medicines that we depend on in our daily lives, chemical change may be mostly invisible to students. What is a chemical change? H...

Healthy body, good teeth, strong bones-the benefits of calcium in proper nutrition are well known. Why is milk promoted as an important source of calcium? Explore the chemistry behind the nutrition with this experiment that measures the amount of cal...

Anyone who has spent any time at the local pool has one “burning” question-“Just how much chlorine was added to this pool?” Swimming pool chemistry involves a rich variety of chemical concepts and practical applications. In this two-part experiment, ...

Your students will love to grow their own silicate crystal garden in microscale test tubes! In this kit, the crystal growing ability of 11 different metal salts in sodium silicate solution will be contrasted and compared. Students will be amazed by t...

Beautiful silver chemistry "mirrors" real-life applications of oxidation and reduction! Students create microscale silvered culture tubes by reacting silver-ammonia complex ions with dextrose. Dextrose is a reducing sugar—it reduces silver ...

Several titrations can be performed during one class period with surprisingly good results. Students determine the percentage of acetic acid in household vinegar by titrating the vinegar with a sodium hydroxide solution of known concentration. The in...

This unique microscale chemistry kit allows pairs of students to run and time eight trials simultaneously! The effects of concentration, temperature and a catalyst on the rate of an iodine clock reaction are tested. A starch solution acts as an indic...

Redox reactions are important not just in chemistry but also in biology and human nutrition. Help your students build vital connections between the sciences with this laboratory kit exploring the reactions of iron(II) and iron(III) compounds with oxi...

The activity of zinc, copper, lead, magnesium and silver are tested. Small amounts of chemicals and metals produce less waste while still producing good results. The students will actually see more reactive metals going into solution while less react...

Through microscale qualitative tests, students will learn the properties, ways to identify, and test for three types of halides: chlorides, bromides and iodides. Qualitative analysis will give the student the knowledge necessary to identify chemical ...

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...

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...

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...

The combustion reaction of hydrogen and oxygen has been used to send people to the moon and to design electric vehicles for the future. What factors determine the explosiveness of this reaction? In this microscale lab activity, students generate hydr...

An intense flame, blinding light, and searing heat-magnesium burning in air is a dazzling reaction. But how much heat is produced when magnesium burns? In this advanced-level microscale experiment, students use an indirect method and Hess's Law to de...