During the lab students will wear gloves and if necessary masks.
Educational goal: To understand the 12 principles of green chemistry and the scientific method
Student objectives: Students will understand and apply the 12 principles of green chemistry.
Materials: Vinegar, baking soda, bleach, and household cleansers
Time required: Three days of research, brainstorming, and finally a lab day.
National standards met: S1, S2, S6, S7
Green chemistry principles addressed: 1-12
Teacher prep: Researching the dangers of common commercial household cleansers.
Procedure:
In class, students will write out the 12 principles in their own words in simple language. The class will come to a common definition for all 12 principles. Then students on their own will be asked to pick a household cleaning product and research online whether the manufacture upholds these principles.
In class, students will be asked to create their own cleaning products using environmentally-friendly materials that reflect 12 principles of green chemistry. The class will brainstorm ingredients (baking soda, white vinegar,...
New Vocabulary Terms to review: ethanol, corn stover, hydrolysis, cellulose, hemicellulose, carbohydrates, polysaccharide, starch, saccharide, glucose, enzyme, salivary amylase, cellulose, colorimeter, cuvette, concentration, absorbance, wavelength, nanometer, fermentation, renewable resource, non-renewable resource National Standards Met: Science Content Standards: 8-12 CONTENT STANDARD A: Science as Inquiry As a result of activities in grades 8-12, all students should develop: 1) Abilities necessary to do scientific inquiry, 2) Understandings about scientific inquiry CONTENT STANDARD B: Physical Science As
(2009). Feel the Green Under Your Toes. Retrieved April 6, 2010, from http://www.edcmag.com. Austin Energy. (2009). Sustainable Building Sourcebook: Floor Coverings. Retrieved April 5, 2010, from http://www.austinenergy.com. DiClerico, Daniel. (2010). Home & Garden Blog: Some Low-VOC green finishes make the Grade in the latest Consumer Reports review of interior paints. Retrieved April 5, 2010, from http://blogs.consmerreports.org. Earthshade. (2010). Welcome to our "tree free" online catalog. Retrieved April 6, 2010, from http://www.earthshade.com. Eastern Blass Block.
The students did the same with lemon juice and milk of magnesia, after cleaning out their pipets and the wells. The students then recorded the color changes on their worksheet. It was rewarding to see students carefully test these substances with great curiosity and care, as they could not guess what the result would be. The more challenging part came when the students had to mix acidic and basic solutions,
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