flinnsci.com Liquid Chromatography AP Chemistry Laboratory # 18 Publication No. 10535A Catalog No. AP9093 Introduction In this experiment‚ liquid chromatography is used to separate the substances that are present in grape-flavored Kool-Aid®. First‚ the dyes responsible for the purple color‚ FD&C Blue #1 and Red #40 are separated. Then‚ in a second experiment‚ the other components of Kool-Aid®‚ the flavorings and citric acid‚ are separated as well. Concepts • Resolution • Liquid chromatography
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Rate of Evaporation of Different Liquids Objective of the Project This project is of the rate of evaporation of different liquid‚ in which we also discuss the factors which affect the rate of liquid. Introduction When liquid is placed in an open vessel. It slowly escapes into gaseous phase ventually leaving the vessel empty. This phenomenon is known as vaporization or evaporation. Evaporation of liquids can be explained in the terms of kinetic molecular model although there
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Calculating the Density of Liquids II. Purpose/Background: The purpose if this lab was to determine the density of water and an unknown liquid. Density is defined as the mass of a substance divided by its volume. It is an intrinsive property of matter and is used to specifically characterize substances. III. Procedure: 1.We massed an empty 10mL graduated cylinder to the nearest .01g. 2.Then‚ we filled the graduated cylinder with 4.0-5.0 mL of distilled water‚ 3.massed it to the nearest 0.1
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PRE-LAB REPORT Lab: Density of Liquids and Solids Purpose of the experiment: The purpose of this lab is to help understand how to resolve the density of liquids and solids. Also‚ the lab is supposed to teach us how to record lab data and how to measure volume and mass the correct way. Lastly‚ it’s designed to help us understand significant values and its relationship to measurements and data recording. Lab Techniques: One technique that will be used during this lab is comparing the
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Abstract By separating chemicals out of a mixture and purifying them through sublimation and recrystiliation‚ changes in the substances physical properties can be shown. A salicylic acid-naphthalene mixture was mixed together with diethyl ether and saturated sodium bicarbonate. Two layers separated and were extracted after acidifying with HCl. This precipitated the crude salicylic acid. The left over mixture was combined with water and the two layers separated where crude naphthalene was recovered
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Lab report: Viscosity of Liquids Introduction This experiment focuses on measurements of different trials of various concentrations. The collected data is used to compare and contrast to the ideal binary solutions and their components. The Ostwald viscometer is a useful laboratory equipment to measure the viscosities of many binary solutions. Background Molecules have the ability to slide around each other‚ result in a flow. Such a flow has a resistance called viscosity. Microscopically
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Liquid Nitrogen Liquid nitrogen is nitrogen in a liquid state at a very low temperature. Its chemical formula is N2. Manufacturing of Liquid Nitrogen Liquid nitrogen is made by cooling and compressing air straight from the atmosphere. The type used to produce large amounts of liquid nitrogen looks vastly different but really happens is that air squashed and cooled . When you squash it‚ air molecules are forced closer together. If you also cool it down the molecules can slow down enough to
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theory can describe molecular bonding in excited states. e) MO theory is used to accurately predict the colors of compounds. Answer: c 9.2 Valence Bond Theory 2. Which of the following statements is/are CORRECT? 1. The overlap between an s orbital and a p orbital is called a pi-bond. 2. The overlap of two s orbitals in H2 is called a sigma bond. 3. HF is formed from the overlap of a hydrogen 1s orbital with a fluorine 2s orbital. a) 1 only b) 2 only c) 3 only d) 2 and 3 e)
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How Does Liquid Crystal Display Television Works? Submitted to: Prof. Rico Bien Simon Oxales Submitted by: Manalon‚ Angelo Ocaya‚ Angelou Ortiz‚ Joel Partos‚ Mhar Angelo Ravena‚ Rosemarie How Does Liquid Crystal Display Television Works? 1. What are the Basics of Liquid Crystal Display? 2.1. Where does LCD display rely? 2.2. What is the purpose of liquid crystals? 2.3. What makes up the apparent color of each pixel on the screen? 2. What is Addressing?
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Advantages: Sulfamic acid is the fastest de-scaler - It dissociates into hydroxonium ions more readily in aqueous solution than the others‚ therefore giving a greater concentration of atoms that are able to react with the calcium in lime scale. It is safe to use because it does not produce chlorine gas [5]‚ which can be toxic. Sulfamic acid also has a low volatility. Disadvantages: Sulfamic Acid can be an irritant to eyes or skin and is the most expensive of the de-scalers. Q2) How these de-scalers
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