Milk and Soap Experiment

Description:  Milk is made up of water, fat, and proteins. Each of these molecules have charges and are held together by intramolecular forces. When the dish soap is added to the plate it quickly disperses across the surface as it is attracted to the water molecules and the food coloring is pulled along. This could be used as an anchoring phenomenon on matter, materials, or intramolecular forces.

Web Resource:  Colors on the Mooooove - ACS

Watch what happens when you put a drop of dish detergent into a plate layered with milk and food coloring! James Kessler explains the chemistry that causes this tie-dye-like reaction and gives a demonstration for kids to follow along with at home. Try the experiment at home! http://www.acs.org/content/acs/en/education/whatischemistry/adventures-in-chemistry/experiments/colors-move.html Subscribe! http://bit.ly/AmerChemSOc Facebook!

Indestructible Coating - Polyurea

Description:  In this video a watermelon is covered with a polymer and survives a drop from a large tower. The polymer is formed when two reactants join to make a flexible and durable polymer known as a polyurea. The chemical reaction is exothermic, releasing heat as the reactants combine. This phenomenon could be used in a unit on chemical reactions, extended structures or chemical engineering. The company Line-X uses this polymer to make bed liners for pickup trucks.

Web Resources:  Polyurea - Wikipedia, Line-X

Used in everything from bullet-proof vests to the walls of the Pentagon, polyurea's strength comes from its long-chain molecules.

Reaction in a Bag

Description:  This video shows a chemical reaction of sodium bicarbonate (baking soda), calcium chloride (road salt), and an indicator phenol red. The chemicals react to form calcium carbonate, sodium chloride, and carbon dioxide gas. This changes the pH inside the bag resulting in a color change in the phenol red. As much air as possible should be removed from the bag as possible to show the production of the gas. This could be used as an example of chemical reaction that releases energy (exothermic). Since the bag is sealed it could be massed before and after to show the conservation of mass (atoms). This phenomenon was submitted by Brian Babulic.

Web Resources:  Reaction in a Bag - Flinn Scientific, American Chemical Society - Explanation

This video show the chemical reaction between phenol red liquid, sodium bicarbonate (white powder), and calcium chloride (white bits). There is a chemical reaction that produces carbon dioxide gas which inflates the bag, heat, and color changes to yellow. ScienceFix.com producer: Darren Fix

Burning Steel Wool

Description:  This is an excellent phenomenon to discuss chemical reactions and the conservation of mass. Steel wool is burned leading to an increase in mass. When doing this in class show the students the burning steel wool to begin with and have them predict the change in mass. Most students believe the mass will either increase or decrease. This phenomenon can be used at the beginning of a unit on chemical reactions and students can investigate their individual models. (e.g. mass comes from fire, oxygen, carbon, etc.)

Web Resources:  Combustion of Iron Wool - CFNS Experiment 36

High School Chemistry Mass change during a chemical reaction Iron wool/steel wool is placed on an electric balance and ignited using a burning splint. The change in mass can be observed as the iron wool burns. Students should be able to explain why the mass reading on the balance increases at the end of the experiment.

A good experiment for youngsters.Ask first: Does iron burn? 'No' they say. Ask: When things burn do they get heavier or lighter? 'Lighter' they say. Use iron wool, not steel wool and get the finest grade you can get from the ironmongers.

Reusable Heat Packs

Description:  This phenomenon uses a supersaturated solution of sodium acetate. Clicking the metal disc releases a small number of crystals of sodium acetate which act as nucleation sites for the crystallization of the sodium acetate into a hydrated salt. Energy is released from the crystal lattice. The heating pack can be placed in boiling water and the sodium acetate can be dissolved again. This phenomenon shows how bond energy can be released.  It also shows the importance of chemical engineering and could lead to a section where students design a device (or application) of their own.

Web Resource:  Chemical Heat Pack - Wikipedia, Snappy Heat - Amazon

Clicking the metal disk inside causes a few of liquid sodium acetate molecules to flip to a crystallized state causing a chain reaction. The solidifying liquid creates 130°F of exothermic heat in the process. You can boil the package to return the crystallized sodium acetate back to a liquid form for reuse.

Will It Conduct?

Description:  Conductivity is an excellent way to classify material by their observable properties. Conducting material (e.g. metal), non-conducting material (e.g. plastic), and semi-conducting material (e.g. graphite) should all be used. A simple circuit with a lightbulb is used to determine the conductivity of different materials. These properties can be used to determine if a chemical change has occurred by testing before and after substances have been mixed. These properties can also be used in the design of an engineering solution.

Web Resource:  Teach Engineering - Conductivity

Students build their own simple conductivity tester and explore whether given solid materials and solutions of liquids are good conductors of electricity. View the full activity on TeachEngineering: https://www.teachengineering.org/activities/view/cub_electricity_lesson04_activity1 TeachEngineering has over 1,500 FREE lessons and activities. Visit https://www.teachengineering.org/ for more! Music: Blue Skies - Silent Partner

Slime

Description:  Everyone loves slime...especially elementary students. This phenomenon is a great introduction into chemical reactions. The properties of the reactants can be compared to the properties of the products to show that a chemical reaction has occurred. In high school the chemistry of polymers and cross-linking can be explored through slime.

Web Resource:  The Science of Slime - American Chemical Society

YOU CAN NOW BUY MY SLIME ON ETSY: https://goo.gl/9GMmWA Hey guys! Today I'll be showing you the best, easiest way to make slime. Check out my other slime videos here for more recipes and other ingredients you can use: https://www.youtube.com/playlist?list=PLaa4h6YQbR-qylFFQJEF-BLKHaqGoll_5 ------------------------------ SOCIAL MEDIA & MY OTHER CHANNELS ------------------------------ ♥VLOG CHANNEL http://www.youtube.com/throughmyeyes1515 ♥INSTAGRAM http://instagram.com/courtlundquistt ♥TWITTER https://twitter.com/courtlundquistt ♥SNAPCHAT "courtlundquistt" ♥FACEBOOK http://www.facebook.com/pages/Courtney-Lynne/222643277799359 ------------------------------ COOL STUFF ------------------------------ ♥Ebates for cash back on your shopping.

Elephant Toothpaste

Description:  Elephant toothpaste is a dramatic chemistry demonstration that involves the decomposition of concentrated hydrogen peroxide (H2O2) into water and oxygen. Potassium iodide is used as a catalyst to speed up the reaction. Soap is added to trap the escaping oxygen gas and food coloring is often added to the experiment. This phenomenon can be using in elementary science classes to illustrate non-reversible reactions and can be studied in more detail in middle and high school.

Web Resource:  Elephant toothpaste - Wikipedia

Does an elephant need a toothpaste?

Magnetic Slime

Description:  Students can create magnetic slime using iron filings. A powerful magnet can move and be consumed by the slime.

Web Resource: How to Make Magnetic Slime

Here's how to make it: Magnetic Goo Materials: 4 ounces glue ⅓ cup water 2 tablespoons iron oxide ½ cup liquid starch Neodymium magnets Instructions: 1. In a large bowl, pour out 4 ounces of glue. 2. Carefully pour ⅓ cup of water into your glue container.