EXPERIMENT 5 SEPARATION OF A MIXTURE INTO ITS COMPONENTS BY FRACTIONAL CRYSTALLIZATION Introduction: Fractional crystallization is one of the experimental techniques used to separate or purify mixture. Fractional crystallization makes use of the differences of solubility to separate the components of a mixture. Goals: Applying fractional crystallization to separate a mixture of salicylic acid and copper sulfate pentahydrate into its components. Calculate the percent of salicylic
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Blubber is the fat on an animal often found in colder climates that keeps its internal body temperature stable. By experimenting with multiple different models of handmade blubber‚ it was discovered that using petroleum jelly‚ tin foil‚ and playdough got the best results. It was originally believed that Crisco would work the best because of its thickness and texture‚ but in reality‚ the temperature went down on average 7.75 degrees Celsius each time which was too much from our original temperature
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After the dialysis tubing soaked in the distilled water overnight‚ the measurements showed that the dialysis tubing increased in mass. The initial weight of the dialysis tubing was 19.08 grams‚ but it went up to 19.34 grams after sitting in the distilled water for some time. The amount of distilled water in the beaker also decreased. There used to be 200 mL of distilled water in the beaker‚ but it decreased to 199 mL after the dialysis tubing soaked in it. The data collected supports the claim that
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Question: Will the egg float or sink if put in salt water? Purpose: I want to know why the egg floats in fresh water and not salt water. I want to know if the egg will float in salt water‚ Also this shows why materials float easier in saltwater and sink in freshwater. Research: Since the egg’s density is higher than the density of freshwater the egg will sink. Density is mass per unit volume‚ which means a measure of how much mater is in a certain volume. If you add enough salt the egg will float
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Biology revision test ch.6 2 mid-term exam Marks: /110 1. The following diagram shows two similar models simulating a region of the mammalian alimentary canal. The water in the test tubes surrounding the dialysis tubings was tested with standard food test reagents at the beginning of the experiment and again after one hour. The results showed that neither starch nor reducing sugar was present in the water surrounding tubes A and B at the beginning of the experiment. (7
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Recrystallization is the process in which a chemical compound becomes a solid. The difference between recrystallization and the presence of precipitate is the structure. In Cystristalizatqion the solid compound contain a crystal-like structure. According to Hill and Barbaro the most common method of purifying organic compounds. Not only does recrystallization allow people with the ability to converting organic molecules to crystal-like solids. This process is performed in the creation of rock candy
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In the Shells lab‚ we were to test the effect of pH on shell strength. The independent variable in this experiment is the type of liquid that we put the shell in and the independent variable is the shells’ strength. The first thing we did was get our materials and label the two shells. The shell that was going into the vinegar was labeled “E” (which stands for experimental) and the shell that was going to be put in the salt water was labeled “C” (which stands for control since it is the control of
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Heterotrophs are any organism that consumes organic carbon and energy that is fixed by primary producers. This unit discussed an extremely important pyramid‚ somewhat like a food chain that categorizes heterotrophs. 1st level of the pyramid are herbivores‚ 2nd level are carnivores. Eukaryotes are single celled or multi-celled‚ recapped in this unit‚ the primary consumers are the herbivores‚ the secondary consumers are the herbivore consumers‚ and the tertiary consumers are the top predators. The
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9/17/2013‚ Lois Andersen & Claire Ma “The Power of Osmosis” The purpose of the lab was to discover‚ through osmosis‚ the concentration of sugar water in a potato. First‚ potatoes were cut into strips about 3 centimetres in length and six strips were individually massed. Next‚ the six strips were placed in 6 different Dixie cups‚ labelled A‚ B‚ Q‚ X‚ Y‚ and Z. Each of the Dixie cups were then filled just enough to cover the potato strips‚ with substances that matched the letters of the cups
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When Different Colors of Food Coloring Are Soaked into a Naked Egg‚ Will the Mass Change Depending on the Color of the Ink after 7 Days? The Purpose The purpose of initiating this lab was to test how different chemicals in the outer fluid affects the osmotic properties of a naked egg. Background Information In order to complete this experiment‚ one of the most important things you need to know how to do is how to take the outer “shell” layer off of the egg. The egg shells contain an element known
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