Combustible Liquids (Examples: alcohols‚ esters‚ ethers‚ ketones) Vapors from flammable and combustible liquids can mix with air and burn if they contact an ignition source. Possible ignition sources include hot electrical wires‚ hot surfaces‚ open flames‚ hot particles and embers‚ and sparks. The lowest temperature at which a liquid releases enough vapor to start burning is called the flash point. The flash point is what distinguishes a flammable liquid from a combustible liquid. Flammables:
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pH of several different liquids as well as learning how to change the pH of those liquids by adding other acidic and alkaline mixtures. Materials: Graduated cylinder- used to measure the various liquids 4 100 mL beakers- used to hold liquids when measuring pH pH meter- used to measure the pH of the various liquids Tap water- liquid we are trying to find pH of Distilled water- liquid we are trying to find pH of Soda- liquid we are trying to find pH of Milk- liquid we are trying to find pH
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Charisse Brittney Ann Vicente __________________ THE SCIENTIFIC METHOD: IDENTIFYING WHICH LIQUID EVAPORATES FASTER I. Objectives To know the step-by-step procedure in conducting an experiment To determine how the process of scientific method helps us to solve a certain problem To identify which liquid evaporates faster. II. Science Concept Evaporation is the process whereby atoms or molecules in a liquid state gain sufficient energy to enter the gaseous state. The rate of evaporation is dependent
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Analysis of Essential Oils using Gas Chromatography Lyndon Justin T. Guzman Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City Date Performed: February 2; February 4‚ 2011 Date Submitted: February 18‚ 2011 Abstract The purpose of this experiment is to isolate the essential oil from eucalyptus leaves as a pure compound; moreover‚ the components of the essential oil‚ camphor and limonene‚ will be then separated using gas chromatography technique‚ identify the components by
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Liquid Crystal Displays (LCD) – Working We always use devices made up of Liquid Crystal Displays (LCDs) like computers‚ digital watches and also DVD and CD players. They have become very common and have taken a giant leap in the screen industry by clearly replacing the use of Cathode Ray Tubes (CRT). CRT draws more power than LCD and are also bigger and heavier. All of us have seen an LCD‚ but no one knows the exact working of it. Let us take a look at the working of an LCD. We get the definition
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Bette Nesmith Graham As electric typewriters came into widespread use after World War II‚ Bette Nesmith Graham and countless other secretaries let out a collective groan. The new machines did make typing easier‚ but their carbon-film ribbons made it impossible to correct mistakes neatly with a pencil eraser. As a result of this predicament‚ Graham ended up inventing one of the most widely used office products of the 20th century. Born in 1924 in Dallas‚ Texas‚ Bette Graham dropped out of high
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tested for by a possible employer include Cocaine (crack)‚ Amphetamines (crystal)‚ Opiates (codeine‚ morphine‚ heroin)‚ PCP (phencyclidine)‚ and Marijuana. Gas chromatography/mass spectrometry is used to test hair and urine samples of possible drug abusers or job applicants‚ and it is the best method for the testing of drug use. Gas chromatography and mass spectrometry are two different methods for identifying chemical substances‚ and the two instruments have be coupled together to perform a highly complementary
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Discussion Using the Thin Layer Chromatography experiment‚ caffeine was found to be the most polar due to the fact that it stayed closer to the stationary phase. Caffeine contains four amine groups that are extremely polar as a result of the hydrogen bond and amide functional group. Acetaminophen was found to be the second most polar analgesic drug tested. Acetaminophen contains a polar alcohol group on one side and amide group on the other but also includes non-polar functional groups that consisted
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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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goal of this lab was to create and purify DHFR from BL21 ecoli using column chromatography. To know if we isolate DHFR their will be one band at 53 KD or above 50 KD and in our desalted eluate page should have the highestOD₂₈₀ which translates to the highest enzyme activity .Column chromatography is a method used to purify individual chemical compounds from mixtures of compounds. The main advantage of column chromatography is the relatively low-cost and disposability of the stationary phase used in
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