measure the concentration of the solute because it is temperature independent: Whereby‚ sssssss = freezing temperature of pure Cyclohexane. f freezing temperature of the napthalene-cyclohexane solution. D * Note the possible
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compare the reactivity of an alkane and an alkene Hypothesis: The cyclohexene would react to the bromine water and turn colourless‚ whilst the cyclohexane won’t react. Risk Assessment: What’s the problem? | How do you fix? | How does it work? | Bromine water is corrosive to the skin | Wear gloves | Stops the Bromine water from reaching skin | Cyclohexane/ene is highly flammable | Keep away from naked flames. | No naked flame = no ignition. | Bromine water is very toxic if inhaled | Conduct
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beaker by using a measuring cylinder. The temperature of the liquid was measured. 2. 10 cm3 of cyclohexane was added to the ethanol in the beaker. It was then mixed well and the lowest temperature attained was recorded. B. 1. 10 cm3 of ethanol was added into an insulated 50 cm3 beaker by using a measuring cylinder. The temperature of the liquid was measured. 2. 20 cm3 of cyclohexane was added to the ethanol in the beaker. It was then mixed well and the lowest temperature attained
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As the CEO of the H.B Fuller Company‚ I have a great degree of first-hand knowledge and can honestly say that when it comes to business ethics‚ few American corporations have a better image than the H.B. Fuller Company of St. Paul‚ Minnesota. We are a leading manufacturer of industrial glues‚ coatings and paints‚ having won various awards‚ honors and inclusion in a variety of socially conscious mutual funds‚ all of which attest to our standing as a good corporate citizen. Recently‚ however‚ its handling
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acetone Ice cyclohexane sodium chloride Lab Safety: Wear protective googles‚ apron‚ and gloves. Procedures: Prepare ice/salt/water bath Place 50g of solid NaCl in a 400mL beaker and add just enough water to dissolve the salt. Fill an 800mL beaker 2/3 full of ice‚ and then pour salt water mixture into the beaker‚ stir. In the hood‚ into two nested test tubes‚ add 10 mL of cyclohexane from a buret. Record initial and final buret readings. Then measure the volume of the cyclohexane to the nearest
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Contents 1. Introduction and literature review 1.1 Polypropylene 1.1.1 Polypropylene crystallization 1.2 Polymer degradation 1.3 Broadband dielectric 1.4 Solubility and the cohesive energy density 1.5 Literature review 2. Experimental method 2.1 Solubility of SN 1010 in various solvents 2.2 Calibration curve 2.3 Preparation of polymer/antioxidant mix for films 2.4 Soxhlet extraction 2.5 Broadband dielectric analysis of films 2.6 Broadband dielectric analysis of molten samples
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solution to the remaining solution we had. The reason for this was so that the hydrogen peroxide could convert the iodine ions into iodine. E. In step E you had to transfer the mixture to a separating funnel. You then had to add 10cm3 of cyclohexane which was the scientific
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the temperature much more than others. This is because different substances require differing amounts of energy to evaporate. To test this‚ the temperature change from the evaporation of 4 different alcohols was measured and compared‚ along with cyclohexane. Methanol had the largest change in temperature‚ 18.9 ºC. This indicates that methanol has the weakest intermolecular attractions out of the 4 alcohols‚ because it evaporated the most. This may be because methanol is a small molecule so it has less
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EXPERIMENT 1 “HOW DO I LOVE THEE LET ME COUNT THE WAYS...” DETERMINATION OF AVOGADRO’S CONSTANT Techniques Calibration drop counting MSDS available for • • stearic acid‚ CH3(CH2)16COOH cyclohexane‚ C6H12 Principles molar volume molecular structures surface areas and volumes Avogadro’s constant percent error Recommended Advanced Reading Chapter 3 in Petrucci‚ Herring‚ Madura‚ & Bissonnette’s General Chemistry‚10th Ed. Avogadro Constant...1 INTRODUCTION
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degree of vaporization. This pressure is defined as the vapor pressure of the compound‚ and can be measured at different temperatures. Consider heating cyclohexane‚ a liquid hydrocarbon‚ and measuring its vapor pressure at different temperatures. As shown in the following graph of temperature vs vapor pressure‚ as the temperature of cyclohexane is increased the vapor pressure also increases. This is true for all liquids. At some point‚ as the temperature is increased‚ the liquid begins to boil
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