Chemistry Cookie Project Chocolate Chip Worksheet Page 2
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1
2
3Chocolate Chip Cookies
Yield: 4 Dozen 2-1/2 inch Cookies
Ingredients:
2.66 mol flour
0.31 mol packed brown sugar
0.0335 mol baking soda
0.624 mol eggs
0.036 mol salt
0.062 mol vanilla
1.084 mol butter (at room temp)
2.82 mol Chocolate Chips
0.44 mol sugar
Conversion Instructions
Begin by converting moles to grams for each ingredient and record the grams in the table below. Next, convert
the number of grams to your final baking measurement; again record the measurements in the table below.
Complete all of your calculations on the “Cookie Calculations” sheet. Attach your calculation to this sheet when
you turn in the lab.
Baking Instructions:
Preheat oven to 375°F. Stir flour with baking soda and salt; set aside. In large mixer bowl, cream butter with
sugar, brown sugar, eggs and vanilla. Gradually blend dry mixture into creamed mixture. Stir in the Chocolate
Chips. Drop tablespoon of dough per cookie onto ungreased cookie sheets. Bake at 375°F for 9 to 11 minutes or
until golden brown.
Baking
Baking
Ingredient
Grams
Ingredient
Grams
Measurements
Measurements
Flour
Brown
sugar
Baking
Eggs
soda
Salt
Vanilla
Butter
Chocolate
Chips
Sugar
•
Calculate the conservation of mass in grams (total weight of ingredients compared to finished product).
Total weight of the ingredients = _________ (total of grams from table above)
Weight of 6 cookies = _________
Total weight of all baked cookies = _________
•
Your baked cookies should weigh less than the ingredients total. Why does seem like your cookies do not
follow the conservation of mass?
•
Give one example of a chemical change and a physical change.
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