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30 May, 11:14

In the presence of an acid catalyst, cyclohexanol (100.16 g/mol) is dehydrated to give cyclohexane (82.14 g/mol) and water. A dehydration reaction starting with 3.3 g cyclohexanol produces 2.4 g cyclohexene. Calculate the theoretical yield for this reaction. Report your answer with two significant figures.

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  1. 30 May, 11:32
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    3.3 g cyclohexanol would theoretically produce 2.71g cyclohexene.

    Explanation:

    A theoretical yield is the amount of products created by a chemical reaction, provided none of the reactants were wasted and the reaction was fully completed.

    Let's write out the balanced chemical equation for the reaction;

    Cyclohexanol - -> Cyclohexane + Water

    HOCH (CH2) 5 - -> C6H10 + H2O

    Step 1: Determine the number of moles of each reactant

    Number of moles = Mass / molar mass = 3.3 / 100.16 = 0.03295 mol

    From the equation; 1 mole of cyclohexanol produces 1 mol of cyclohexene.

    This means 0.03295 mol of cyclohexanol produces 0.03295 mol of cyclohexene.

    Mass of cyclohexene produced; Mass = Number of moles * Molar mass = 0.03295 * 82.14 = 2.71g
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