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Published byMarjorie Chandler Modified over 8 years ago
TOPIC: GOOBERS CAUGHT IN A CHEMICAL CHANGE
QUESTION TO ANSWER WHAT HAPPENS TO THE INGREDIENTS THAT MAKES PEANUT BRITTLE HAVE A HARD SURFACE?
OBJECTIVES Participate in both chemical and physical changes in an experiment to make peanut brittle. Identify chemical changes in mixtures.
RESEARCH: When a chemical change occurs in a mixture, some signs of that change can be observed. Some of the signs that a chemical change has occurred include: color changes, forming a gas or foaming, temperature changes and the forming of a precipitate (a solid settling out of the solution.)
Ingredients 1 cup sugar 1 cup light corn syrup ½ cup water 2 cups shelled raw peanuts 2 tablespoons butter 2 teaspoons baking soda 1 teaspoon vanilla
Preparation 1.Assemble all the equipment needed for the experiment. 2.Measure all ingredients and set on counter ready to be added as needed. 3.Pour water into saucepan and bring to boil. 4.Add sugar and syrup. 5.Boil until it “spins a good thread”. 6.Add peanuts and boil until golden brown and peanuts are cooked. 7.Remove from heat and add butter, vanilla and baking soda, stir well. 8.Pour into well buttered cookie sheet, or non-stick cake pan. 9.Break into pieces when cool. 10.Store in an airtight container.
Describe the appearance of the mixture at the following steps. STEPAPPEARANCEAROMATYPE OF CHANGE #4 #5 #6 #7
POST LAB QUESTIONS: 1. Describe the change that occurred in step #4. 2. Describe the change that occurred in step #5. 3. Describe the change that occurred in step #6 4. How do you know a chemical change occurred? 5. What were the signs of a chemical change that you witnessed? 6. Describe the product in step #7 if a chemical change had not occurred.
CONCLUSION (WRITE A CONCLUSION. DID YOU ANSWER THE QUESTION YOU ASKED?)
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