with a match and allow to burn. 3. Add a microspatula of NaCl (sodium chloride) to a small quantity of water (about 5mL) in a test tube. Shake the contents of the tube. Next‚ use a dropper to add 10 drops of 0.1 silver nitrate to the NaCl-water mixture. 4. Obtain a piece of magnesium ribbon about 5 cm long. Tear the ribbon into 1-cm pieces. Place two of the pieces into a test tube and a few drops of 6 M HCl (hydrochloric acid). Caution: Use extreme care in handling this acid. It will cause
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C7 Further Chemistry OCR 21st Century: 2011 specification Made by Nabilah Chowdhury Copyrighted References: OCR 21st Century Further Sciences Book‚ CGP: OCR 21st century + various internet sources Topic 1: Green Industry Brief Intro 14/06/13 Natural resources are converted into useful products. Bulk chemicals produced on a large scale b/c there is a larger demand for them. Fine chemical are produced on a smaller scale. They’re used as feedstock’s
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Chemistry of love: how science can explain our daily lives? By Barton Dong Loving and being loved adds richness to our lives. When people feel close to others they are happier and even healthier. Love helps us feel important‚ understood‚ and secure. When people think of love‚ a romantic emotional scene appears in their minds. In the heavy days of a mutual crush‚ pulses race‚ knees go weak‚ and heads reel. So strong are these feelings‚ they’ve launched a thousand songs and
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in particle size: Sieving: - Is a way pf separating mixtures of solids‚ or solids and liquids with different sized particles - The mixture is poured through a sieve and the particles smaller than the sieve pass through while the larger particles are trapped by the sieve - The are commonly used for cooking - E.g. a mixture of rice and water is poured through a sieve to capture rice and remove the water Filtration - Is a technique commonly used for mixtures of solids and liquid‚ particularly when solids
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values that have trailing zeros only to the left of the decimal point are ambiguous and should be expressed in scientific notation. We must take note that the chemistry textbook (Silberberg 6e) states that placing a decimal point to the right of some trailing zeros (example: 300.) will make the zeros significant. However in General Chemistry‚ we do not follow this rule. If we want to write a whole number with trailing zeros we must use scientific notation to show which zeros are significant. When
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Chemistry 121 Colligative Properties Lab Demonstration of Selected Calculations from Choice I Determination of Kf for Naphthalene To determine the Kf for naphthalene‚ we need to find the difference in the freezing point of pure naphthalene and the solution of 1‚4-dichlorobenzene in naphthalene. Let’s say that we did this experiment‚ used 1.00 g 1‚4-dichlorobenzene in 10.00 g naphthalene‚ and found that the freezing temperature of pure naphthalene was 78.2°C‚ while that of the solution was 75
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reactants used and the amounts of products formed in a chemical reaction”. Basically‚ Stoichiometry is the science of counting and studying the relationship between the amounts of the reactants to the product. To think of stoichiometry outside of chemistry‚ imagine a bookshelf. To assemble the bookshelf you may need 3 planks of wood‚ 1 giant plank of wood‚ and 20 nails. Even though the amount of the reactants is high‚ the product would be only one bookshelf. Stoichiometry is basically studying the
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7. Which liquids boil at a lower temperature than water? ___________________________________________ 8. For which substances would 2 cm3 have a mass greater than 6 g? _________________________________ SECTION 2.2 MIXTURES 1. How might one separate a mixture of water and salt? 2. What is a
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and that compounds are formed by combination by two or more atoms. Work Cited http://www.iep.utm.edu/aristotl/ http://profmokeur.ca/chemistry/history_of_the_atom.htm
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1 UNIVERSITY OF TECHNOLOGY‚ JAMAICA DIVISION OF CHEMISTRY GROUP: MODULE: AS-2‚ SE-3‚ MT-2‚ BPharm-3‚ BENG-2C ANALYTICAL CHEMISTRY (CHY3022‚ CHY2017) ___________________________________________________________________________ UNIT 1: Assigned Reading: BASIC ELEMENTS OF ANALYTICAL CHEMISTRY Chapt. 1 and 8 Fundamentals of Analytical Chemistry‚ 8th edition INTRODUCTION Analytical Chemistry – that branch of chemistry which is concerned with the theory and practice of methods used to determine
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