physical properties. Paper chromatography will be used to separate the dye colors from M&M candy to see which colors contain yellow #5. Gravimetric separation will be used to separate salt and sand from a mixture. Procedure The procedure for this lab can be found on pages 16 – 30 in “General Chemistry CHE110L Laboratory Manual Fall 2013”. Data Tables Carbon copies of data tables have been attached to the back of this lap report. Calculations Paper Chromatography- 1. Yellow M&M’s Rf Value:
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Curley’s wife. Through changes of the character‚ Candy‚ Steinbeck uses foreshadowing to predict the end of the book‚ and he and his dog are like the companionship of George and Lennie. Candy is very old and has a extremely old smelly suffering dog. “I aint much good with only one hand. I lost my right hand here ont the ranch. That’s why they gave me a job swampin’’ (Steinbeck 59). The boss has him do a job that does not need to be done‚ so that candy will feel useful to have around. Since he lost
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Making Rock Candy Question/Hypothesis: How does the presence of seed crystals change the growth rate of rock candy? If you add seed crystals to the rock candy than they will grow faster because molecules will attract faster. Procedure: 1. Cut out 6 pieces of yarn. Two strings one inch‚ two strings two inches‚ and two strings three inches. 2. Soak one measurement of each string in water for five minutes. 3. Squeeze excess water and roll each onto a tablespoon of water. 4.
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Candy Shop When I’m with new people‚ I am the sad black licorice just waiting to be tasted by someone. No matter how hard I try‚ everyone seems to choose the red. Yet those who taste me‚ appreciate my eccentric flavour‚ Even if it’s something they wouldn’t savour again. When I’m on social media‚ I am a collection of perfectly made Sweethearts. No matter which one you choose to enjoy‚ I will always have something nice to tell you. This‚ because I am afraid to anger someone‚ I am afraid to push someone
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Ink Chromatography Lab Background Information Paper chromatography is an analytical method that is used for separating and identifying mixtures of substances into their smaller parts. Paper chromatography works because the ink used contains several dyes (pigments) that when place on porous paper are dissolved in a solvent by capillary action. When the pigments (solutes) are dissolved in the solvent (water & alcohol mixture) they move through the paper at different rates depending on their
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RESULTS AND DISCUSSION: Ultraviolet spectroscopy of Verapamil hydrochloride at λmax of 278 nm in pH 1.2 buffer was found to be linear in range of 20 – 80 µg/ ml. The method was validated and found to be precise‚ specific and accurate. The tablets of Verapamil hydrochloride were prepared by press coating technique showing sustained release for 24 h for once daily dosing with a lag phase of 4 - 6 h. The optimum ratios and type of polymers and other excipients were chosen to produce gastroretentive
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Linearity: A linear correlation coefficient factor was obtained between the peak area used and the absorbance Verses concentrations of lamivudine‚ zidovudine and nevirapine. The calibration curves were linear for concentrations between 15-150 µg/ml. The linearity of the calibration curves was validated by the values of the correlation coefficients (r2). The correlation coefficients were 0.999 for lamivudine‚ 0.999 zidovudine and 0.999 for nevirapine. The results of the linearity experiment are listed
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Salary: $4977.10 - $6183.10 / mo Final Filling Date: Continuous Duties: The Criminalist is the entry‚ training and sub journey level for the series. Criminalist will perform routine and less complex technical laboratory analyses and assist higher-level Criminalist in the examination of crime scenes and in the scientific investigation of crimes. Requirements: Education: Equivalent to graduation from college with a major in one of the physical or biological sciences‚ including the equivalent of
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Gas chromatography (GC) is a chromatography technique where the separation of individual components (analytes) from a sample relies on their differing distribution between a mobile and stationary phase. The mobile phase carries the analytes through the stationary phase. In GC‚ it’s an inert gas (usually helium or nitrogen). The gas must be inert‚ so it won’t react with the sample to give a false reading. The stationary phase is a substance fixed in place to which the sample adsorbs because
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Chemistry 100 Experiment #2: Chromatography of Food Dyes Name: Cassandra DeVaux Date: April 17‚ 2014 Purpose: To learn how mixtures of compounds can be separated and what food dyes are found in certain foods Introduction: In this exercise we will separate food dyes from a variety of sources. We will first gather data on known dyes where we know how many substances make up the dye. Then we will collect data on some samples where we do not know the make-up. We will compare our
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