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Unformatted text preview: As you can see, substance A has a lower melting point than substance B. But the mixture of them both has a lower melting point than either of the substances separately. Based on the class data, the eutectic point is a mixture of 30:70 or 40:60, with a final melting point of 65.8c. It is the ratio of the two substances that has the lowest boiling point. Part III The final melting point of my unknown mixture was 62c. I estimate that my mixture was 40:60 or 30:70. Both of these ratios have the same class data. In order to determine the composition of my unknown mixture I would create a 40:60 mixture and mix that with my unknown mixture. If the melting range of this resulting mixture is lower than the melting range of my unknown mixture, then I can conclude that my unknown mixture is not a 40:60 composition. I could then create a 30:70 mixture and repeat the previous steps. If my unknown mixture were indeed a 30:70 composition, then the melting range would remain constant....
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- Spring '08