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Flinn Lab Activities and Demonstrations
Classifying Matter—Demonstration Kits
Classifying Matter—A “Nuts-and-Bolts” Demonstration Kit
By: The Flinn Staff
The perfect introductory activity to teach elements, compounds and mixtures! What does an element look like? How is an element differ- ent from a compound? Bulk samples of an element, a compound and a mixture may look similar. When we ask students to classify matter using these concepts, we want them to see what they look like “on the inside”—to imagine atoms and molecules. Use this “nuts-and-bolts” demonstration to help students visualize abstract concepts relating to the classification of matter. Your students will be more successful in learning chemistry as they build visual connections between the real world and that of atoms and molecules. Demonstration Notes included. Concepts: Elements, compounds, mixtures, classification of matter. Time Required: 20 minutes
Materials Provided: Bolts, nuts and washers to fit; plastic Petri dishes with covers.
Creating Elements—
Multi-Demonstration Kit
By: The Flinn Staff
Over time, students become familiar with the properties of elements and their characteristic reactions to form compounds. In this three-part demonstration, show the other side of that coin by using characteristic reactions to produce elements from compounds.
• Tin, Sn—Grow a beautiful “tin-man” crystal tree by running an elec-
tric current through a solution of tin(II) chloride. Students will enjoy this “electric” oxidation–reduction demonstration as elemental tin is produced. What happens if the current is reversed?
• Silver, Ag—A copper wire coil is suspended in a silver nitrate solu- tion. The coil is coated with shiny elemental silver “needles” and the solution turns blue as silver ions are replaced by copper ions.
• Carbon, C—Your students will be amazed as they watch a yellow solid–liquid mixture turn brown, then black, expand out of the top of the beaker, and solidify. The beaker becomes extremely hot and the odor of burnt sugar becomes noticeable. The solid black product is elemental carbon!
Includes detailed instructions, a reproducible student worksheet, and Instructor’s Notes with tips and answers to all questions.
Concepts: Electrolysis, cathode, anode, oxidation–reduction, single replacement reaction, dehydration reaction, exothermic reactions. Time Required: 30 minutes
Chemicals Provided: Copper wire, silver nitrate solution, sodium carbonate, sucrose, sulfuric acid, tin(II) chloride solution.
Measuring the Length of a Molecule—
Chemical Demonstration Kit
By: The Flinn Staff
Help your students visualize the length of a single molecule. First, the surface of water is dusted with lycopodium powder, then a drop of oleic acid solution is placed directly in the center. The oleic acid will spread out in a circle, displacing the lycopodium powder so that it forms a ring that is visible to the eye. By simply measuring the size of the circle formed by the oleic acid with a ruler, you can calculate the length of a single oleic acid molecule.
Concepts: Langmuir method, micelle formation, physical properties. Time Required: 15 minutes
Chemicals Provided: Ethyl alcohol, lycopodium powder, and oleic acid.
1-800-452-1261
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Classifying Matter—
A “Nuts-and-Bolts” Demonstration Kit AP6291
Catalog No.
Description
Price/Each
AP6291
Classifying Matter—A “Nuts and Bolts” Demonstration Kit
$26.00
Creating Elements— Multi-Demonstration Kit AP7535
Catalog No.
Description
Price/Each
AP7535
Creating Elements—Multi-Demonstration Kit
$56.50
Measuring the Length of a Molecule— Chemical Demonstration Kit AP5927
Catalog No.
Description
Price/Each
AP5927
Measuring the Length of a Molecule— Chemical Demonstration Kit
$42.00