Question

For the reaction shown, compute the theoretical yield of the product in grams for each of...

For the reaction shown, compute the theoretical yield of the product in grams for each of the following initial amounts of reactants. 2Al(s)+3Cl2(g)→2AlCl3(s) 1.) 5.5 gAl; 19.8 gCl2 2.) 0.439 gAl; 2.29 gCl2

Homework Answers

Answer #1

Atomi weight of Al =27 Cl =35.5

2Al(s)+3Cl2(g)→2AlCl3(s)

2 moles of Al reacts with 3 moles of Cl2 to give 2 moles of AlCl3

(2x27=54) grams of Al reacts with (3x71=213) grams of Cl2 to give (2x133.5=267) grams of AlCl3

1.) 5.5 gAl; 19.8 g Cl2

    Here the limiting reagent is Cl2 which has proportionally less mass compared to Al which has excess mass.

    So, the theoretical yield depends on mass of Cl2

    213 grams of Cl2 produce 267 grams of AlCl3

    19.8 grams of Cl2 produce ---? grams of AlCl3   = (19.8/213)x267 = 24.82 grams

2.) 0.439 gAl; 2.29 gCl2

    Here the limiting reagent is Al

    54 grams of Al produce 267 grams of AlCl3

     0.439 grams of Al produce ----? grams of AlCl3 = (0.439/54)x267 = 2.17 grams

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