"Bromine and alkanes" Essays and Research Papers

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    Synthesis of an Alkyl Halide

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    uncontrollable environmental factors. Introduction An alkyl halide or haloalkane is composed of hydrocarbons with a halogen attached to a sp3-hybridized carbon. It resembles an alkane with a halogen attached to it. Halogens are fluorine‚ chlorine‚ bromine‚ and iodine. Any of these halogens seen to be attached to an alkane‚ could then be identified as alkyl halides. They are generally polar because of the electronegativity difference of carbon (2.5) with the halogen (2.5-4.0). However‚ most alkyl

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    product. (iii) An important safety precaution in the experiment is to prevent sucking back. (1) What is the potential hazard if sucking back occurs ? (2) How can sucking back be prevented ? (iv) If the gaseous product decolorizes a solution of bromine in tetrachloromethane‚ can you conclude that the gaseous product in ethene ? Explain your answer. (8 marks) 2. 93 3(b)(iii) When chemical wastes such as methylbenzene and tetrachloromethane are burnt in the incinerator in the plant‚ several

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    Vegetative reproduction

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    Vegetative reproduction (vegetative propagation‚ vegetative multiplication‚ vegetative cloning) is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. It can occur naturally or be induced by horticulturists. Although most plants normally reproduce sexually‚ many have the ability for vegetative propagation‚ or can be vegetatively propagated if small pieces are subjected to chemical (hormonal) treatments. This is because meristematic

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    War Poem

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    The Earth’s atmosphere has changed over billions of years‚ but for the past 200 million years it has been much as it is today. We are‚ however‚ causing our atmosphere to change by human activity. Burning fossil fuels and deforestation are two examples of human effect on the environment. Composition of the Earth’s atmosphere The composition of air You need to know the proportions of the main gases in the atmosphere. The Earth’s atmosphere has remained much the same for the past 200 million years

    Free Carbon dioxide Oxygen Hydrogen

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    c1 notes

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    early atmosphere - earth roughly 4 billion yrs old - created by volcanoes erupting + releasing gases - contained mostly co2 + water vapour - earth cooled + water vapour condensed to form oceans - co2 dissolved into oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest

    Free Carbon dioxide Oxygen Carbon

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    4th Form Chemistry Questions

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    4th form Chemistry questionnaire 1. All of the following structures show the same molecule‚ except one. Which structure is different? H H H H A) H -- C -- C -- C --- C -- H B) CH3 CH2 CH2 CH3 H H H H H H -- C -- H CH3 C) H H D)

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    ALKYNES

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    6-Dimethyl-3-heptyne 1‚6-Heptadiyne  Common names: prefix the substituents on the triple bond to the name “acetylene” IUPAC name: Common name: 2-Butyne D imethylacetylene 1-Buten-3-yne Vinylacetylene  Physical Properties Similar to alkanes and alkenes of comparable molecular weight and carbon skeleton 2-Butyne 1-Pentyne Melting Point Formula (°C) -81 HC CH CH3 C CH -102 CH 3 CH2 C CH -126 -32 CH3 C CCH3 CH 3 ( CH2 ) 2 C CH -90 1-Hexyne CH 3 ( CH2 ) 3 C CH

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    Chmistry Notes

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    (note: there is CO2 solid‚ its dry ice) – Complete combustion: ▪ hydrocarbon + oxygen [pic] water + carbon dioxide – Displacement reactions: ▪ Y + X (anion)[pic] X + Y (anion); where Y > X on activity series or Eo table. • Alkene/alkane reactions: – Cracking of pentane: ▪ pentane [pic] ethylene + propane ▪ C5H12 (g) [pic] C2H4 (g) + C3H8 (g) – Hydration of ethylene (the reverse can also happen known as de-hydration‚ where concentrated acid is used): ▪ ethylene

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    Grignard Reaction Lab

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    Grignard reaction Abstract: In this laboratory‚ triphenylmethanol was synthesised from reacting benzophenone and bromobenzene using Grignard reaction. As the reaction was to set up to produce a Grignard reagent and then recrystallize it to obtain pure sample. The percentage yield obtained was 55% and its melting point was 161 co which is within the literature value 160-163 co. In addition to that the IR spectroscopy confirmed the molecule structure to be triphenylmethanol. Introduction: The Grignard

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    Hsc Chemisrty Syllabus Notes

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    Production of materials 1B – identify the industrial source of ethylene from the cracking of some of the fractions from the refining of petroleum Industrial source of ethylene (ethene) * Obtained from Crude oil – fractional distillation * Heated to high temps * Components vaporise and rise up tower where condense and collect * Lower the boiling point‚ higher up tower compound rises * Separates crude oil into fraction each with different boiling range - Catalytic Cracking

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