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22 January, 17:57

If you start with 512 grams of aluminum and 1147 grams of copper chloride to make aluminum chloride and copper, what is the limiting reagent? 2Al + 3CuCl - > 2AlCl3 + 3Cu

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  1. 22 January, 18:38
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    First you need to calculate the number of moles of aluminium and copper chloride.

    number of moles = mass / molecular weight

    moles of Al = 512 / 27 = 19 moles

    moles of CuCl = 1147 / 99 = 11.6 moles

    From the reaction you see that:

    if 2 moles of Al will react with 3 moles of CuCl

    then 19 moles of Al will react with X moles of CuCl

    X = (19 * 3) / 2 = 28.5 moles of CuCl, way more that 11.6 moles of CuCl wich is the quantity you have. So the copper chloride is the limiting reagent.
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