# Lights, Camera, Action! A Filmed Chemistry Demonstration.

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 Keywords: Flip Video, Subject(s): Grades 10 through 12 NETS-S Standard: Creativity and InnovationCommunication and CollaborationResearch and Information FluencyCritical Thinking, Problem Solving, and Decision MakingView Full Text of Standards School: Soldan International School, Saint Louis, MO Planned By: Andrew Goodin Original Author: Andrew Goodin, Saint Louis
National Science Education Standard H.B.3.c: "A large number of important reactions involve the transfer of either electrons (oxidation/reduction reactions) or hydrogen ions (acid/base reactions) between reacting ions, molecules, or atoms. In other reactions, chemical bonds are broken by heat or light to form very reactive radicals with electrons ready to form new bonds. Radical reactions control many processes such as the presence of ozone and greenhouse gases in the atmosphere, burning and processing of fossil fuels, the formation of polymers, and explosions.

Objectives:
-Students will be able to classify a reaction by the 5 basic types.
-Students will be able to predict the products of a chemical reaction.
-Students will be able to balance a chemical reaction.
-Students will be able to calculate the mass of a product formed given the mass of reactants.
-Students will be able to perform safe lab practices.
-Students will be able to calculate the percent yield of a reaction.

Background knowledge:
For successful implementation, students should have a strong background in chemical reaction basics, including classifying the type of reaction, predicting products, balancing, and basic stoichiometry (including percent yield).

Pre-lab slip (completed as homework the night before, student arrive to class with it completed): “10 grams of hydrogen gas is exploded in excess oxygen gas.
1) Identify the type of reaction.
2) Predict the product(s) of this reaction.
3) Balance this reaction.
4) Calculate the mass of each product formed.
5) Which safe lab practices would be necessary for carrying out this reaction?
6) Imagine that you’ve completed this reaction and 4.5 grams of product is created, what is the percent yield?”

Lesson: The instructor divides students into groups of 2 or 3 (based on equipment available). Each group is provided a FLIP camera with tripod, a white board, a dry erase marker, and reactants/supplies for their reaction. Every effort should be made to provide each group with a different reaction. Single/Double replacement reactions are the easiest to complete within the 90 minute period. Examples of appropriate reactions include:
-Decomposition of sodium bicarbonate.
-Baking soda and vinegar (students measure volume of CO2 using an inverted graduated cylinder.
-Magnesium ribbon oxidation.