331LPreLabs

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Quiz Brominzation of Hydrocarbon Which of the following halogens is most reactive under radical reaction of alkanes? answer is F2 How many mono-chlorinated organic product(s) will form in the reaction of 3-ethyl-2-methylpentane with Br 2 in presence of light? answer: 5 BC Since there are 5 different types of hydrogen, it will result in 5 different mono-chlorinated compounds. How many secondary hydrogens are there in isopropylcyclohexane? answer is 10 Which statement(s) related to this experiment is(are) true? -Even though the bromine solution in this experiment is very dilute, you must still be cautious since bromine itself is corrosive. - Methylene chloride (also known as dichloromethane) is a halogenated solvent In this experiment one should not look directly into the UV light being emitted by the handheld UV lamps All chemical wastes from this experiment should go in the Halogenated Organic Waste bottle. ------------------------------------------------------- Quiz Preparation of 4-methylcyclohexane In this experiment, why is the distillate washed with solution of sodium carbonate? answer: to neutralize residual acid If the reaction shown below is successfully performed, what major change will be observed in the IR spectra of the reactant and product? answer: A sharp (narrow) and moderately strong absorption in the IR spectrum of the reactant will be replaced by an intense broad absorption band in the IR spectrum of the product. Which of the following safety precautions should be observed in this experiment? (For credit, check ALL that apply.) answers: a,b,c,d,e In this experiment, a portion of the product with be treated with a few drops of a reddish-brown solution of bromine in dichloromethane. Which of the following choices best describes the evidence that will indicate that bromine has been consumed by the alkene? answer: The
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