Chemistry 30S Organic Chemistry Performance Task
Your Task
In groups of no more than two students, construct a bath bomb, prepare a product information label, and package your product for sale.
Part I. Making the Bath Bomb
Equipment / Chemicals· 100 mL beaker / · Citric acid, 20 mL
· 250 mL beaker / · Cornstarch, 20 mL
· 600 mL beaker / · Ester fragrance, 1.0 mL
· Glass stir rod / · Baking soda, 65 mL
· Plastic sandwich bag / · Vegetable oil, 30 mL
Data
Record the masses of each of the ingredients before making the bath bomb.
Ingredients / Mass (+/- 0.1 g)Procedure
1. Mass each of the dry ingredients using the 250 mL beaker.
2. Mass the vegetable oil and the ester for fragrance using the small beaker.
3. Pour all ingredients into the large beaker and mix carefully with the glass stir rod. Take care not to break the stir rod!
4. Form the mixture into the shape of your choice. Place the bath bomb in a plastic sandwich bag and take home to dry and package. At home remove the bath bomb from the plastic and allow to dry for 24 to 48 hours before packaging.
5. Package the bath bomb as if it were a consumer product. Keep in mind that the bath bomb is brittle and an airtight seal will prevent the fragrance from escaping over time.
Part II. Preparing the Product Information Label
Prepare a product information label which lists all of the ingredients, from highest to lowest concentration by percent mass (%w/w). Use appropriate IUPAC naming systems for the baking soda and ester ingredients.
Part III. Package Your Product for Sale
This is your opportunity to create an attractive product as if it were to be available for sale. Be creative and consider who you may sell to, where your product may appear, how your product will be manufactured and shipped, and how you wish it to be displayed in a store.
Student Data Sheet
Sample Calculations
Provide a sample calculation for each unique type of calculation.
Bath Bomb Assessment Rubric
Student 1 / Student 2Criteria / Novice
(0 or 1) / Intermediate
(2 marks) / Expert
(3 marks)
Group prepares a bath bomb / Bath bomb is not shaped (1) or no bath bomb present (0) / Shape of bath bomb is the same as another group and/or has no unique aesthetic aspect(s) / Bath bomb has a unique shape and/or has some unique aesthetic aspect(s)
Product information label present / Label is missing information from more than one of the expert level categories (1) or no label present (0) / Label is missing information from one of the expert level criteria or some information from expert level criteria is incorrect / Label includes the names of all ingredients, including the correct IUPAC names for baking soda and the ester, and the corresponding percent weights by mass ordered from highest to lowest percent concentration by mass
Bath bomb packaging / Only one or no criteria met / Only two criteria met / Packaging secures bath bomb, is airtight, and informs the reader of its contents in a unique way
Evidence of equitable participation / One student does most or all of the work / Evidence of one group member contributing more than another student or student does not submit statement of individual contribution / Evidence that all group members contributed equitably and each member submits a piece of writing listing their specific contribution(s) to the completion of the task
Student 1 Mark / /12 / Student 2 Mark / /12
Product information Package
Concentrations of all ingredients are in mol/gSodium bicarbonate, NaHCO3 (mol/g), Cornstarch, C6H10O5 (amylose and amylopectin) (mol/g), citric acid, C6H8O7 (192.13 g/mol) (2-hydroxypropane- 1,2,3-tricarboxylic acid) (mol/g), vegetable oil ()(), ester name (mol/g)