oil (animal) w Cooking oil (vegetable) w Olive oil. Teaching tips Other fats can be tried – eg melted butter‚ melted lard‚ melted margarine‚ and specific products such as Flora and Clover. –3 This experiment has also been trialled using KMnO4(aq) (0.0005 mol dm ) as the indicator. This turns from purple to colourless while unsaturation is still present. The procedure is the same as for bromine water‚ but portions of the potassium permanganate are added with swirling until the mixture
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Results Two different graphs have been generated to represent the values gathered from the quantification of strawberry DNA. For Figure 1.‚ the relationship between the absorbance at 550nm found within each concentration of Potassium Permanganate KMNO4 “methylene blue.” The linearity for the absorbance as a function of concentration for methylene blue at 540 nm in Figure 1 is linearly applicable and its values are within close vicinity to the trend line without any dramatic linear regression. For
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Exercise 7.3 (training!!!) 1. Find the oxidation numbers of the underlined elements in the following species. (a) (e) (i) (m) (q) (u) (y) 2. SO3 PbSO4 CoCl42CrO42SO32Ca(NO3)2 Co(NH3)43+ VO2+ CaH2 KMnO4 SCl2 N2 NaOH (c) (g) (k) (o) (s) (w) HCO3[Al(OH)4]MnO42NO2FeCl3 KOCl (d) (h) (l) (p) (t) (x) H2S2O7 H2O2 Cr2O72K2SO4 CH4 Pt(CO)4 Which of the following equations represent redox reactions? Specify the species being reduced in each case if applicable. (a) (b) (c) (d) NaI(s) + 2K(s) + 2NH3(g)
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English Proficiency This test is designed to assess the test takers’ general proficiency in the use of English language as a means of self-expression in real life situations and specifically to test the test takers’ knowledge of basic grammar‚ their vocabulary‚ their ability to read fast and comprehend‚ and also their ability to apply the elements of effective writing. 1. Grammar 1. Agreement‚ Time and Tense‚ Parallel construction‚ Relative pronouns 2. Determiners‚ Prepositions‚ Modals
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To calculate the number of moles of an unknown mass from its mass and molecular mass To know how to dilute a solution and the effect of dilution on the solution’s absorbance Materials: Copper Sulfate Coloured solution – Potassium Manganate (KMnO4) Hotplate Method: Part A: The Formula of Hydrated Copper (II) Sulfate Firstly‚ about 1.0 g of hydrated copper (II) sulfate was put in the weighing bottle and the colour was noted. The mass of capped weighing bottle and hydrated copper (II) sulfate
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Designation: C 114 – 07 Standard Test Methods for Chemical Analysis of Hydraulic Cement1 This standard is issued under the fixed designation C 114; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 These test methods cover
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Exercise 1: Correct Use of the Scientific Method and an Experiment with Macromolecules I. Objectives In this lab‚ students will: a.) Learn how to utilize the Scientific Method to develop a testable hypothesis b.) Generate an effective experimental design from a hypothesis c.) Understand the chemical differences between different macromolecules and how these differences can be used to design tests for each molecule. d.) Identify macromolecules in solutions using chemical analyses. e.) Practice
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with mineral acid or alkalis yield corresponding carboxylic acid . R–CN +H2O RCOOH +NH3 CH3–CN + 2H2O+HCL CH3COOH + NH4CL 4. BY OXIDATIVE CLEAVAGE OF ALKENES: Alkenes when heated with alkaline KMNO4 are cleaved at double bond to form carboxylic acids. R–CH=CH–R +4[O] 2RCOOH H3C–CH=CH–CH3 + [O] 2CH3COOH REACTIONS OF
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CHEMISTRY OF NATURAL PRODUCTS Terpenoids Sameena Bano Department of Chemistry Faculty of Science Jamia Hamdard New Delhi-110062 (24.09.2007) CONTENTS Introduction Classification of Terpenoids Isolation of mono and sesquiterpenoids General properties of Terpenoids General methods of structure elucidation Terpenoids Citral Menthol Camphor Eugenol Keywords Terpenes‚ isoprene‚ citral‚ menthol‚ camphor and eugenol 1 Introduction There are many different classes of naturally occurring
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CONCENTRATION AND DILUTION Physiology 1‚ Las Positas College Name: In science‚ concentration is a measure of the number of particles (solutes) in a given volume. If one room has 100 people in it‚ and a room of equal size has 50 people‚ one can say that the concentration of people in one room is twice that of the other. Quite simple‚ isn’t it? On a molecular level‚ consider whether you put one lump or two of sugar‚ or no sugar at all‚ in your coffee. If you use two lumps‚ you prefer twice
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