Fluorenone Abstract: A mixture of Fluorene (1) and Fluorenone (2) was separated by column chromatography. Chemical Equation: Fluorene (1) Fluorenone (2) Mp 114C mp 83C MW 166.22 MW 180.21 Introduction: Column chromatography was invented by Tswett in 1906 so that his study of the chemistry of chlorophyll could be facilitated. Tswett made significant advances in the method and demonstrated its applicability to the separation of many different kinds of mixtures. Column chromatography
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Report Introduction: One morning Ms. Mandell woke up to find a weird type of matter. It was a wired heterogeneous mixture we could tell where the solvent and solute separated. She has no idea what it is so she brought the sample to class to show us. The purpose of the lab is for us to try and figure out what makes up this heterogeneous mixture‚ by making observations on the mixtures that we will be making with the different solvents and solutes she provided she provided for us. When we mixed A3 with
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Shelby Brown 8/28/10 Physical and chemical changes lab essay Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance. Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing
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is an example of an extensive property? a. mass b. density c. color d. boiling point ______ 4. Which of these is an example of an element? a. sugar b. soil c. water d. oxygen ______ 5. Which of these is an example of a heterogeneous mixture? a. salt b. nitrogen c. mud d. air ______ 6. Which process is a chemical change? a. heating to boiling b. dissolving in alcohol c. burning in air d. slicing into two pieces ______ 7. At sea level‚ water boils at 100°C. This is an example
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Introduction Weight determination represents one of the most accurate and precise form of measurement carried out in lab analysis. Thus‚ gravimetric analysis provides a great assay of a variety of analytes. Mixtures of compounds in difference phases provide us with one of the simplest methods of separation and mass explorations. Separating a solid mass from a liquid involves the commonplace technique of filtration. Accordingly‚ the conversion of an analyte dissolved
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| |Formal Report 1 | | | |Experiment Number 3 | | | |Chem201L | | Determination of
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other substances c. Mixture: a substance consisting of two or more substance mixed together d. Solution: A homogeneous mixture of two or more substances e. Emulsion: a colloid in which both phases are liquids f. Suspension: a mixture in which fine particles are suspended in a fluid where they are supported g. Colloidal dispersion: a colloid that has continuous liquid phase in which a solid is suspended in a liquid. 5. How do you classify the four mixtures used: a. Salts and
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honey production. OR (a) Identify soluble and solvent in the following solutions: [3] (i) Aerated drinks (ii) Tincture of iodine (iii) Lemon water (b) State the principle of each if the following methods of separation of mixtures. [2] (i) Centrifugation method (ii) Separation using separating funnel. 24. (a) Differentiate between Mass and Weight [Four points]. [2] (b) Show that weight of an object on moon is equal to of the weight if the object on the earth. Given
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Separation of a Mixture of Solids PURPOSE: The purpose of this lab is to familiarize ourselves with the techniques associated with separating a mixture of different solids. We will learn how the unique properties of substances can aid in this process and help us distinguish each pure substance from one another. DATA OBSERVATIONS CALCULATIONS CONCLUSION/DISCUSSION QUESTIONS A. How did your proposed Procedures or flow charts at the beginning of this experiment compare to the actual Procedures
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1. It is estimated that uranium is relatively common in the earth’s crust‚ occurring in amounts of 4 g/metric ton. A metric ton is 1000 kg. At this concentration‚ what mass of uranium is present in 1.0 mg of the earth’s crust? a) 4 nanograms b) 4 micrograms c) 4 milligrams d) 4 × 10–5 g e) 4 centigrams Ans: a) 4 nanograms Page: 1.3‚6 2. In 1928‚ 1.0 g of a new element was isolated from 660 kg of the ore molybdenite
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