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Lab: Modeling Alkanes Purpose: to assemble several simple hydrocarbons. Relate three-dimensional shapes of molecules to the names, formulas, and pictures used to represent molecules on paper. Refer to the pic. In your text on page 180. The picture shows a ball and stick structure and space filling structure for methane. CH . Methane is the simplest alkane. Alkanes are considered Saturated hydrocarbons because each carbon atom is bonded to the maximum number of other atoms (four). When building molecules use this color key as a guide: BLACK- Carbon YELLOW- hydrogen PROCEDURE: PART I 1. Construct a methane. CH molecule. In your lab notebook draw the Lewis Dot structure and the structural formula for methane. Compare your model with the two structures you drew. Note that the angles in your model are not 90 angles, as your drawing might suggest. This structure is called a TETRAHEDRON. The angles between each of the C-H bonds are 109.5.
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