Name: Date: Course: Lesson: Unit: Chromatography Lab INTRODUCTION: In 2 to 3 complete sentences‚ explain the purpose of this lab – what are you going to learn in this lab? (2 points) HYPOTHESIS: Answer the following in complete sentences: (2 points) 1. List one extensive and one intensive property of marker ink. 2. Define mixture. MATERIALS: coffee filter Tape rubbing alcohol water 3 different color magic markers (not permanent) 3 identical tall‚ narrow
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Different compounds absorb with different strengths depending on their ability to dissolve in the eluent and temperature. The distance that a spot moves up on chromatography paper is used to characterize the absorption of that substance.
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Partition equilibrium of a solute between two immiscible solvents Two-dimensional thin-layer chromatography 2 2 3 6 Chapter 65 Quantitative methods of analysis Detection of end point in acid-alkali titration 8 Chapter 66 Instrumental analytical methods More about infrared spectroscopy More about mass spectrometry 12 15 Chapter 67 Contribution of analytical chemistry to our society Gas chromatography-mass spectrometry 32 PART XV ANALYTICAL CHEMISTRY Chapter 63 Detecting the presence
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Forensic Science: Analytical Techniques Unit 6 Project Student: Steve Gregory Kaplan University CJ385-01 Professor: Al Luckas Forensic Chemistry and Trace Evidence Analysis Author S. Gregory October 31‚ 2011 Forensic scientists are governed by a process that is known as the scientific method. The scientific method adheres to strict guidelines which will ensure the careful and systematic collection‚ organization‚ and analysis of
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4 unknown samples are genuine perfumes‚ and which are imposter/fake perfumes. This will be done by analysing gas chromatography plots‚ and comparing the components in the samples to that of a known standard perfume. Results: To determine which of the four sample perfumes where imposter and which were real‚ components present in each perfume were analysed using gas chromatography and compared to the known real perfume sample. The components identified for comparison included vanillin‚ 3-penten-2-one
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produce the chlorine radicals. The combination of 1-chlorobutane and sulfur chloride will produce four dichlorobutane isomers. The isomers produced and their reactivity will be analyzed by the amounts of isomers produced in the product and by gas chromatography. Procedure: 1) Assemble the apparatus in the hood using a Thermowell Heater 2) Use a 25-mL round bottom flask fitted with a reflux condenser which will be connected through a vacuum adapter to a 500-mL filter flask.
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AP Lab #5 Plant Pigments/Photosynthesis I. Identifying the Effects of Different Variables of Light and Carbon Dioxide on the Rate of Photosynthesis and Observing the Separation of Pigments Through Chromatography II. Introduction Plants have a variety of pigments‚ all of which absorb a different color of light. The three main pigments are chlorophyll a‚ chlorophyll b and carotenoids. Chlorophyll a is the primary plant pigment that absorbs red and blue light‚ which ultimately appears green to the human eye
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High Performance Liquid Chromatography Analysis of Aspirin Problem: Was aspirin (acetylsalicylic acid) successfully synthesized? Are there impurities or by-products present in the synthesized aspirin? How pure is the synthesized aspirin? Introduction: In the last experiment‚ aspirin was synthesized followed by characterization of the product using several different techniques. Melting point was a test that provided information about the identity and purity of the aspirin product. The iron(III)chloride
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time between the injection of a component into the column and the elution of that component is constant. This characteristic is used to perform qualitative or quantitative analysis. Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of glass‚ plastic‚ or aluminium foil‚ which is coated with a thin layer of adsorbent material‚ usually silica gel‚ aluminium oxide‚ or cellulose. A small amount of the
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Calculations: a. 1. W = Vend − Vstart W = 1.87 mL – 0.92 mL W = .95 mL Wave = W1+W22 Wave = .95 mL+ .88 mL2 Wave = .915 mL 2. Vstartave = Vstart1+Vstart22 Vstartave = .92 mL+ .90mL2 Vstartave = .910 mL VRave = Vstartave + Wave2 VRave = .910 mL + .915 mL2 VRave = 1.37 mL 3. k’ = Vrave-VmVm k’ = 1.37 mL-.49 mL.49 mL k’ = 1.79 4. α = k’bluek’red α = 4.141.79 α = 2.31 5. R = (VRaveBlue-VRaveRed).5 (Wave(Blue)+Wave(Red))
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