Melting point

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    experiment one, are determining the melting points of different crystalline substances following a specific procedure. By finding the melting point of a crystalline substance, it helps determine what kind of compound it is as well as initiate the purity. A DigiMelt apparatus can be used to determine the melting point where a small amount of the the substance is packed into a capillary tube and heated slowly in the apparatus which includes a thermometer, a heating coil and a magnifying eyepiece for observing the substance. The two temperatures that need to be noted down is the first point at which liquid is formed on the crystalline substance, and second the point at which the crystalline substance turn into a clear liquid. These two…

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    The melting point of a substance is best described as the temperature at which a solid becomes a liquid (Bruice 2014). On the molecular level, when a compound melts the forces between the molecules become weaker. This is because when a substances heats up the kinetic energy between the molecules increase causing the molecules to vibrate. When the vibrations become strong enough for the molecules to move around and pass other molecules, the compound that is being heated up starts to melt and…

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    Post-lab: Recrystallization of benzoic acid Calculations: I initially poured 1.10 grams of impure acid into my flask. After the experiment was done, I had 0.54 grams of pure benzoic acid. This gives a difference of 1.10-0.54=0.56 g and a percentage of (0.54/1.10)*100=49.09% The true melting point of pure benzoic acid is 122.41°C and I received 126.9°C as my melting point. This gives a difference of 126.9°C-122.41°C=4.49°C and a percentage of (122.41/126.9)*100=96.46% Results: Impure benzoic…

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    Diels Alder Reaction Lab

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    The next thing that was found was the percent yield which is equal to the actual yield over the theoretical yield times 100. Since the theoretical yield was 0.00056M, the result was a 34% yield. The melting point was found to be 262.7 oC, which lies within the correct range theoretically. The results of the TLC plate testing also concluded that the product was pure. The spot from the product appeared half way up the card while the anthracene was at the top and the maleic anhydride was at the…

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    Did you know, if you add salt or ice to anything cold the temperature drops? In my experiment, I wanted to find out if different materials impact the rate of ice melting. Before starting this experiment, I know sugar and salt dissolve in water and sand turns into mud. I predict that the results of this experiment will be that the sugar and salt will make the ice melt at a faster rate than the sand because sugar and salt dissolve in water and sand does not. To complete this experiment I will…

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    Sucrose Results

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    Conclusion: After observing the evidence that we received from this experiment it is clear that the results thoroughly support my hypothesis. Within my hypothesis I had stated that the melting order from first to last was, as follows, paraffin, glucose, sucrose, and finally, salt. The results that we gathered supported this exact hypothesis. The first substance to melt was indeed paraffin and the second was glucose, and then sucrose and finally salt. The results are supported by the basic…

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    Tartarin Melting Point

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    Abstract: The melting point ranges for the substances Tartaric Acid, Acetaminophen, and Phenacetin, which are in powder form and white in color, was found and compared to their literature values to find their purity. The melting point range of a 9:1 mixture of Phenacetin and Tartaric acid was later found to show the effect an impure substance has on temperature. Melting point range for unknown three that was lastly tested was matched to Acetaminophen by comparing their melting points.…

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    Melts Ice Fastest

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    What do you think melts ice fastest? What makes black ice melt the fastest? This question is very important, because it best asks how to melt ice fast. It is important to melt ice fast because 60% of car crashes are caused by black ice, so it is important people melt this black ice. Based on research, the heater will melt ice the fastest. The three topics being researched in this essay are, What is the freezing point of water? What is the temperature of your hand? Is ice dense or light? Why…

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    Ice Change Research Paper

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    Ice transforms at a point of degrees. This degree would be 32 degrees Fahrenheit or 0 degrees Celsius. It must be at this degree or lower to transform into ice. If it is higher than the freezing point of water, then it will be a form of water or ice melting into water. The different molecules, or also called the things that make up the ice or water, are more dense in cold water. They become dense and come to each other which makes them tight into an ice cube. When the ice gets warm, it moves the…

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    Melting Point Value

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    A important tests were performed on the product to pressure the results: melting point value, percent yield, IR, and TLC. The experimental melting point value was found to be a range of 165-167 ºC being a little lower than the literature value for camphor, the intended product, was 175 ºC. The sharp range was resulted in a slightly pure product. The percent yield was lower than expected which can be the reason most of the product was lost during the extraction and almost completely sublimated…

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