9a. Two student groups tested the same indicator-sample combination, but they got opposite results. One group reported a color change, but the other group did not. Give at least one possible reason why the two groups observed different results for the same indicator-sample combination. 9b. What is the advantage of having replicate tests (i.e. two different groups testing the same indicator with the same sample)? 10. Use the data from all of the student groups to complete the following table. Did indicator solution 1 Did indicator solution 2 change color? change color? Sample Replicate 1 Replicate 2 Replicate 1 Replicate 2 Corn Starch Potato starch Egg whites Gelatin Sucrose Vegetable oil Water If there are any differences between the replicates of any test, your class will probably need an additional, very careful replicate test to resolve the disagreement. 11a. Based on the results in question 10, is either indicator solution a good test for starch? If yes, one? 11b. Briefly summarize the evidence that supports your conclusion. 11c. What additional evidence would help you to be more certain of your conclusion?
9a. Two student groups tested the same indicator-sample combination, but they got opposite results. One group reported a color change, but the other group did not. Give at least one possible reason why the two groups observed different results for the same indicator-sample combination. 9b. What is the advantage of having replicate tests (i.e. two different groups testing the same indicator with the same sample)? 10. Use the data from all of the student groups to complete the following table. Sample Did indicator solution 1 change color? Did indicator solution 2 change color? Replicate 1 Replicate 2 Replicate 1 Replicate 2 Corn Starch Potato starch Egg whites Gelatin Sucrose Vegetable oil Water If there are any differences between the replicates of any test, your class will probably need an additional, very careful replicate test to resolve the disagreement. 11a. Based on the results in question 10, is either indicator solution a good test for starch? If yes, one? 11b. Briefly summarize the evidence that supports your conclusion. 11c. What additional evidence would help you to be more certain of your conclusion?
StarchProteinProtocol.docx