Using Melting Point And Boiling Point At Determining Unknowns

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Amina Batiste
Morris Bonton
Organic Chemistry I Lab
5 February 2015
Experiment 1: Utilizing Melting Point and Boiling Point to Determine Unknowns
One of the first topics learned in most chemistry class is the relation between physical and chemical change. Based on what type of changes the properties of an element, substance, and or compound has gone through can be extremely informative. Taking a more specific focus towards physical properties in this experiment, boiling point and melting point are great examples of physical changes that do not change to composition of a compound. 1,2
Boiling and Melting point are physical features that are very unique to each compound or element. The two are points of reference where a physical phase change occurs as a sample transitions between solid, liquid and or gas. Ideally according to the Chemistry Department at Purdue University, melting point is the threshold upon which a solid becomes a liquid. Whereas threshold for the boiling point of a substance is the point where it transitions from a liquid state to a gas state.2 Both can be used to identify the purity of a substance as well.1
The purpose of this experiment was to determine the melting point and the boiling point of various unknown solids and liquids supplied by the laboratory. In the process of exploring the most basic physical properties of the given samples, skills such as: proper determination of compound purity through different means and how to
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