Questions: 1. One mole of a compound A‚ with vapor pressure 400mmHg at 50oC‚ mixed with 3 moles of compound B‚ with vapor pressure 480mmHg at 50oC to form a homogeneous solution. What is the vapor pressure of mixture at 50oC? XA =moles of A\total No. of moles XA =1\4 XB=3\4 Ptotal=PAoXA+PBoXB =400*1\4 + 480*3\4 = 460mmHg 2. Why should a distilling flask be filled not less than 1\3 filled or more than 2\3 full? This is to allow the liquid being heated room to expand as it turns
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I. Introduction Fractional distillation is the separation of a mixture into its fractional parts that entails many concurrent vaporization-condensation cycles. This works because of different boiling points of individual substances. The temperature of the fractional distillation column decreases as its length increases. A higher boiling point component condenses on the column and returns to the solution whereas the lower boiling point component passes through the column and is collected in a receiver
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Name: Leigh O’Neill Date: 10th February 2015 Lab Partner: Sinead Murphy Title: Resolution of Trans-Cyclohexane-1‚2-diamine Abstract: The experiment of resolution of Trans-Cyclohexane-1‚2-diamine was completed using recrystallization. This produced a percentage yield of 85% from a theoretical yield of 2.638g. Introduction: Enantiomers are identical and equal in their physical properties except for optical rotation which can be viewed by polarimetry. Diastereomers have different densities‚ melting
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Distillation is a commonly used method for purifying liquids and separating mixtures of liquids into their individual components. Familiar examples include the distillation of crude fermentation broths into alcoholic spirits such as gin and vodka‚ and the fractionation of crude oil into useful products such as gasoline and heating oil. In the organic lab‚ distillation is used for purifying solvents and liquid reaction products. To understand distillation‚ first consider what happens upon heating
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Steam distillation of cloves produced 0.53g of an oil which contained in its IR spectrum the functional groups O-H (at 3520 cm-1)‚ sp2 C-H (3080 – 3000 cm-1)‚ aliphatic C-H (2980 – 2940 cm-1)‚ and both alkene C=C (at 1640 cm-1) and aromatic C=C (at 1514 cm-1). The IR spectrum is attached to this report. These data are consistent with the structure of eugenol‚ shown in Figure 2 below: In addition‚ the IR of the product from the steam distillation of cloves closely corresponds with that of an
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experiments carriedout for the degradation of fabric dyes from aqueous solution using Chara and Chara beads are discussed below.Various analytical techniques like UV-Vis‚ FTIR spectroscopy were used to confirm the decolorization as UV-Vis spectroscopy; FT-IR spectroscopy and toxicity bioassay were truly used [14]. Also‚ Fourier transform infrared spectroscopy (FT-IR) is widely used to confirm the product obtained after decolorization of dye degradation experiments [15]. It helps in determination
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Matt Cramer Alex Chen 2/7/17 Food Dye lab Spectroscopy of Food Dye Lab Introduction You’re coming off the field after a hard fought game against your rival team. You are needing a drink and you grab a blue Powerade off the managers table. The drink delivers the electrolytes needed to sustain throughout the rest of the day. Then‚ the athlete starts to think how much of his blue Powerade is actually made from the blue food dye. The food dyes have had a tremendous affect on global economics
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Chromatography of Food Dye Chem 180-DL3 Abstract: The goal of this experiment was to use different dyes to determine the Rf value. Chromatography is done to determine the presence of a mixture in a substance. In this experiment different dyes were used such as McCormick food coloring‚ M&M’s‚ Kool-Aid‚ and the dyes that came with the lab kit. Experiment and Observation: In this experiment a 50mL beaker was filled with luke warm water and a pinch of salt water was dissolved in it
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101 9/6/13 Hair Dye Hair dye has always been a controversial product. Many believe that it is harmful to not only the consumer but to the environment. While other believe that it is perfectly okay to use and that the only cons to it is that it can dry your hair out or turn it orange. But what really are the pros and cons of hair dye? Is it safe? No doubt there are many different kinds‚ and colors as well as purposes. Let’s take a look at the various kinds and see why hair dye is one of the most
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[pic] Cultural Intelligence Cultural engagement‚ understanding and communication in a complex and constantly changing business environment Appendix [pic] Aalborg University‚ July 2009 Culture‚ Communication and Globalization Master’s Thesis Appendix to thesis Appendix I - 3 - INTERVIEW GUIDE - 3 - Appendix II - 6 - Interview transcript Interviewee I-C - 6 - Interview transcript Interviewee I-D - 15 - Interview transcript Interviewee I-E - 32 - Interview
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