Chemistry 2283g Experiment 1 – Alkyl Halides EXPERIMENT 1: Preparation and Reactivity of Alkyl Halides Relevant Sections in the text (Wade‚ 7 ed.) • 6.7 (p. 228) Reactions of alkyl halides • 6.8 – 6.12 (p. 229 – 242) The SN2 reaction: generality‚ factors affecting SN2 reactions‚ substrate reactivity‚ mechanism • 6.13 – 6.14 (p. 243 – 249) The SN1 reaction: mechanism‚ stereochemistry General Concepts The most common of the variety of methods available for preparing alkyl halides is the replacement
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has been a tremendous increase in the yields of various crops to meet the demand of overgrowing population‚ achieved by using pesticides and insecticides. These are chemicals that are sprayed over crop to protect it from pests. For example‚ DDT‚ BHC‚ zinc phosphide‚ Mercuric chloride‚ dinitrophenol‚ etc. All pesticides are poisonous chemicals and are used in small quantities with care. Pesticides are proven to be effective against variety of insects‚ weeds and fungi and are respectively called insecticides
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Aquatic habitats The variability in marine salinity between habitats does not impact the fish living there True. Which energy pyramid cannot be inverted? Pyramid of energy Which marine habitat would have the least access to primary producers? Deep sea and sea floor Which of the following aquatic environment would not freeze in water Salt marsh Less than 0.1% True The most productive marine habitats are in the open ocean False If a stationary body of water has a constant temperature from
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` CHEMISTRY PROJECT ON PRESENCE OF INSECTICIDES IN FRUITS AND VEGETABLES A PROJECT REPORT Submitted by VAISHAKH MURALEEDHARAN Class: XII-A JANUARY 2015 DEPARTMENT OF CHEMISTRY SHANTINIKETAN INDIAN SCHOOL DOHA-QATAR SHANTINIKETAN INDIAN SCHOOL‚ DOHA – QATAR Affiliated to the Central Board of Secondary Education‚ Delhi. Approved by the Ministry of Education‚ State of Qatar. BONAFIDE CERTIFICATE This is to certify that this project report entitled “CHEMISTRY PROJECT ON” PRESENCE
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0.160 mol I2 253.8 g I2 = 40.6 g I2 1 mol I2 ii) what percentage yield of iodine was produc ed. 40.6 g I2 x 100 = 79.9 % 50.8 g I2 2. Zinc and sulphur react to form zinc sulphide according to the equation. Zn + S ZnS If 25.0 g of zinc and 30.0 g of sulphur are mixed‚ a) Which chemical is the limiting reactant? 25.0 g Zn 1 mol Zn 1 mol ZnS =.382 mol ZnS 1 65.41 g Zn 1 mol Zn 30.0 g S 1 mol S 1 mol
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Experiment 1: Synthesis of Copper Compounds Introduction This experiment involves the synthesis of compounds originating from pure solid copper. By applying solubility rules and the reactive properties of substances‚ many compounds which would otherwise be costly to extract from nature are able to be synthesized in the laboratory. Laboratory synthesized may sometimes be more economical than natural extraction‚ however it poses its own problems with the amount of substance that is actually yielded
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| 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH | -1 | Carbonate | CO3 | -2 | Nitrate | NO3 | -2 | Phosphate | PO4 | -3 | Hydrogen Carbonate | HCO3 | -1 | Acids and Bases in the Laboratory Back to Top Some common acids that are found in laboratories are Hydrochloric acid (HCl)‚ Sulphuric acid (H2SO4) and Nitric acid (HNO3). Some
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Higher Chemistry Mole Calculations Moles and Number 1 mole of any substance contains the same number of atoms/molecules/ions as there are atoms in a 12g sample of carbon -12 12g of carbon-12 contains a constant number of atoms. This number is known as the Avogadro constant (L) and is equal to 6.02 x 1023. 1 mole of carbon-12 contains 6.02 x 1023 atoms. Therefore‚ 1 mole of any substance contains 6.02 x 1023 atoms/molecules/ions. For example‚ 1 mole of aluminium contains
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bicarbonate‚ silver nitrate‚ Barfoed’s test‚ Borax Test‚ Bial test‚ Osazones‚ Seliwanoff’s test‚ Molisch test‚ Beilstein test‚ hydroxamic test‚ sodium hydroxide hydrolysis‚ complex copper formation‚ ninhydrin test‚ nitrous acid‚ alkaline hydrolysis and‚ Zinc and ammonium chloride hydrolysis were used for the test for presence of functional groups. II. Introduction Preliminary tests previously learned are not enough to identify organic compounds. Functional groups present in organic compounds
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molecular weight of a gas is __________ g/mol if 3.5 g of the gas occupies 2.1 L at STP. A) 41 B) 5.5 × C) 37 D) 4.6 × E) 2.7 × 10) The volume of hydrogen gas at 38.0 °C and 763 torr that can be produced by the reaction of 4.33 g of zinc with excess sulfuric acid is __________ L. A) 1.69 B) 2.71 × C) 3.69 × D) 2.84 E) 0.592 11) The Mond process produces pure nickel metal via the thermal decomposition of nickel tetracarbonyl:
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