Collecting BUG LAB - due today
Climatograph introduction
Biome Investigation & matching of climatographs
Biome Investigation
Biology 12
Organic Molecule Mystery Introduction
Carbohydrate video
Carbohydrate Mystery Lab
Work on Carb section of journal
Set up duotang workbooks
Identification of an Unknown
Test the unknown sample, the known samples and water using the following tests.
Reducing sugar test: positive test (colour change to orange or red)
Place 3ml of each solution in a separate, appropriately labelled test tube. Put 3 ml of water in another tube as a control sample. To each tube add 5 drops of Benedicts solution. Record initial colour. Heat the mixtures in a hot water bath for 2 to 3 minutes and observe any colour changes. Record final colour. Which samples contain sugar?
Observations:
Samples
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Initial Colour
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Final Colour
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Sugar present?
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1.
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2.
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3.
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4.
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5.
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Complex Carbohydrate test: positive test (colour change to black)
Place 5 drops of each solution of extract on a drop plate. Put 5 drops of water on the plate as a control sample. Record initial colour. Add 2 drop of iodine solution to each sample. Observe any colour changes other than that due to the iodine solution. Record final colour. Which samples contain complex carbohydrates?
Observations:
Samples
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Initial Colour
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Final Colour
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Complex Carbs present?
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1.
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2.
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3.
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4.
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5.
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