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20 June, 10:41

It is desired to produce 3.66 grams of phosphorus trichloride by the following reaction. If the percent yield of phosphorus trichloride is 83.7 %, how many grams of chlorine gas would need to be reacted?

phosphorus (P4) (s) + chlorine (g) phosphorus trichloride (l)

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  1. 20 June, 11:39
    0
    mass of Cl₂ = 1.46 g

    Explanation:

    given data

    mass of phosphorus trichloride = 3.66 G

    mas of chlorine gas = ?

    efficiency = 83.7 %

    balanced chemical equation

    2P + 3Cl₂ → 2PCl₃

    The mole ration of chlorine and phosphorus trichloride = 3 : 2

    First we will find out number of moles of Cl₂ and PCl₃

    As we know that:

    number of moles = mass / molar mass

    number of moles of PCl₃ = 3.66 g / 137.33 g. mol-

    number of moles of PCl₃ = 0.027 mol

    As the mole ratio of PCl₃ and Cl₂ = 2 : 3

    so number of moles of Cl₂ = (0.027 * 3) / 2

    number of moles of Cl₂ = 0.041

    Now we find the mass of Cl₂

    mass of Cl₂ = moles * molar mass

    mass of Cl₂ = 0.041 mol * 35.5 g/mol

    mass of Cl₂ = 1.46 g
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