chem lab report 3

chem lab report 3 - ratio: 51-55°C; 40-60 ratio:...

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Austin Thai Chem 3AL, Sec. 103 February 26, 2010 Lab #3: Mixed Melting Points Discussion Part I: After finding my melting point from the unknown substance given to me, and finding a lab partner that shares similar melting point range of about 4 degrees Celsius, I mixed the two unknowns together in a sample, and then measured out the melting point range of it. From that melting point range, I merely searched for a similar range to mine and then recorded and used it. Part II: 90(A) – 10(B) average melting point range: 65.3 – 71°C; 80(A) – 20(B) ratio: 57.4-61.3°C; 70-30 ratio: 51-53.2°C; 60-40 ratio: 50.3-51.2°C; 50-50
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Unformatted text preview: ratio: 51-55°C; 40-60 ratio: 51.5-53.6°C; 30-70 ratio: 67-69°C; 20-80 ratio: 54.5-57.2°C; 10-90 ratio: 82-83.5°C. (Graph on separate piece of paper.) Part III: From the diagram shown in Part II, the estimated mixture of A and B should be approximately around composition of 70% A and 30% B, as most of the temperatures and melting points average out around 56°C, and therefore lines up, according to the diagram, around the 70%A and 30% B composition ratio....
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This note was uploaded on 04/19/2010 for the course CHEM 70987 taught by Professor Hopkins during the Spring '10 term at UC Davis.

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