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Tools and Techniques
| Question | Answer |
|---|---|
| Indicators | Chemicals that can show the presence of a specific substance. A positive test indicator will change color if the substance is present |
| Iodine | Tests for the presence of starch, a complex carb (sugar). If starch is present, then iodine will change from amber to a blue-black color. |
| Benedicts | Tests for the presence of glucose, a simple carb (sugar). If glucose is present, benedicts will changes from a blue to a red, orange, or yellow color. Benedicts must be heated. |
| Biuret | Tests for the presence of protein. If protein is present, it will go from a blue to a purple or pink color. |
| Bromothymal Blue | Tests for CO^2(or acid, since CO^2 is acidic). If CO^2 is present, then BB will change from blue to yellow. |
| Red Litmus Paper | Tests for bases and will turn blue in a base. |
| Blue Litmus Paper | Tests for acids and will turn red in an acid. |
| Hydrion Paper | Tests for the exact pH of a substance. |
| Phenolphthalein | Tests for bases and will turn hot pink in a base. |
| Brown Paper Bag | Tests for fats/lipids. Fats will leave a greasy stain on the bag. |
| Acidic-base scale | 1-6 are acids, 7 is neutral, 8-14 are bases |