Separation Of Mixture Of Solid Lab Essay

Experiment 3: Identification of an Unknown Mixture by Extraction, Recrystallization and Melting Point Determination Alex Presello 103402448 Lab Completed: October 10th, 2014 University of Windsor  Experiment 3: Identification of an Unknown Mixture Abstract The purpose of this experiment was to first, extract two of three possible organic compounds from an unknown organic mixture (#2) and second, to identify them. The two main methods of separation used in this experiment were liquid-liquid extraction

separate mixtures of substances into their components. There are different types of chromatography but they are all based on the same principal. Paper chromatography is an analytical method that is used to separate colored chemicals or substances, especially pigments. They all have a stationary phase and a mobile phase. The moving substance is called the mobile phase while the stationary phase stays put. The mobile phase flows through the stationary phase and carries the components of the mixture with

Table of Contents Part A: 3 Introduction: 3 Gas Chromatography (GC) 3 Gas- solid chromatography 3 Gas-liquid chromatography 3 Advantages: 3 Disadvantages: 3 High performance liquid Chromatography (HPLC) 4 Advantages: 4 Disadvantages: 4 Part B: 5 Introduction 5 References 6 Part A: Introduction: Forensic Chemistry involves a variety of different techniques in which have the ability to analyse samples found on crime scene, one set of techniques is that of chromatography. Chromatography

Discussion – Experiment 3A: Separation and Identification of Organic Unknowns Unknown #1 Extraction is a separation method that utilizes differences in solubility to separate compounds (1). The purpose of this experiment was to separate three different organic compounds using extraction and then to identify them by using infrared (IR) spectroscopy. An extraction was carried out on a 750-mg solid mixture containing an acidic, neutral, and basic unknown. In part 1 the solid mixture was first dissolved in

CHEM 333L Organic Chemistry Laboratory Revision 1.1 Isolation of Lycopene from Tomato Paste using Column Chromatography In this laboratory exercise we will isolate the pigment Lycopene from tomato paste. In a follow up lab, we will examine the UV-VIS spectrum of Lycopene, isomerize it and then examine the isomer’s spectrum for comparison. Lycopene, the red pigment of the tomato, is a C40-carotenoid made up of eight Isoprene units; making it a tetraterpene. Other sources of the compound

Identifying an Unknown Solid Using Melting Point and Mixed Melting Point Data Shultz, Joshua T. Chemistry 2210L Results The experimenters inserted a capillary tube containing approximately 2 to 3 mm of benzoic acid into a manual Mel-Temp melting point apparatus. With the Mel-Temp dial set between 3 and 4, the temperature increased at a steady rate of approximately 2° C per minute from a plateau set at 90° C. The first appearance of liquid occurred at 119° C, and the benzoic acid completely

evaporation rate, heat and swirl the mixture over a heat bath. When a solid remains or no more solvent evaporates, the unknown was left to dry to constant mass. After the unknown was dry, it was boiled with enough water (found by calculations) to dissolve it completely and was cooled to room temperature. An Erlenmeyer flask was used to accommodate the largest volume of recrystallization solvent calculated and was cooled in an ice bath to increase the yield of crystals. The solid was collected by vacuum filtration

the Major Component of Clove Oil Pre-Lab Questions: 1.) Briefly explain the concept of steam distillation. What is the difference between a simple distillation and a steam distillation? When a mixture of two immiscible liquids are distilled it is referred to as codistillation. This process is referred to as steam distillation when one of the liquids is water. This distillation is used to separate organic liquids from natural products and reaction mixtures in which the final product results

methods administered in order to separate volatile compounds from each other in a mixture. For example, simple distillation is commonly used to separate a liquid and solid mixture, or a liquid and liquid mixture, as long as the difference between the each boiling point is greater than 40-50%. However, if the difference of the boiling point of the compounds is not at least 40-50% then fractional distillation is used. In this lab, fractional distillation is used to isolate an unknown liquid in order to determine

each other. The idea is that most of organic compounds will be more soluble in organic solvents than they are in water (1). The extraction, in its most basic form, will result in unequal distribution of solute between two immiscible (not forming one mixture when added together) solvents (2). Since both of the solvents are immiscible, two separate layers will be formed inside of the separatory funnel (2). Once the two layers have been separated, it is easy to draw off the bottom layer by opening the bottom