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Molecules in Two Dimensions Structural Formulas Chem Catalyst You will smell samples of three molecules: Vial F: Ethyl pentanoate: C7H14O2 Vial G: Butyric acid C4H8O2 Vial H: Ethyl acetate C4H8O2 Predict how their smells might compare. Give evidence for your predictions. Team Work Print and tape instructions on the left page. Draw the table on the right page. Fill in your predictions. Vial Chemical Name Molecular Formula F ethyl pentanoate C7H14O2 G butyric acid C4H8O2 H ethyl acetate C4H8O2 Predicted Smell Actual Smell Results Most students agreed on the following actual smells when they opened the vials: Vial F: sweet Vial G: putrid Vial H: sweet Use this data to complete the table. Then go on and complete Part 2 of the activity (see instructions, then come back to notes on the next slide). Notes Structural Formula: A drawing or diagram of a molecule that shows how the atoms in the molecule are bonded (covalent). Molecules with identical formulas can have different structures, giving them different properties, like smell. Isomers: Molecules with the same molecular formula but different structural formulas. Merely rotating the molecule or bonds does not change the structural formula or properties of the molecule (1-propanol). Homework Lesson 2: Molecules in Two Dimensions Pages 149-153. Questions #1-6.
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