A 1.4639-g sample of limestone is analyzed for Fe, Ca, and Mg. The iron is determined as Fe2O3 yielding 0.0357 g. Calcium is isolated as CaS

Question

A 1.4639-g sample of limestone is analyzed for Fe, Ca, and Mg. The iron is determined as Fe2O3 yielding 0.0357 g. Calcium is isolated as CaSO4, yielding a precipitate of 1.4058 g, and Mg is isolated as 0.0672 g of Mg2P2O7. Report the amount of Fe, Ca, and Mg in the limestone sample as %w/w Fe2O3, %w/w CaO, and %w/w MgO

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Thạch Thảo 3 years 2021-09-04T11:10:13+00:00 1 Answers 280 views 0

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  1. lethu
    -1
    2021-09-04T11:12:07+00:00
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    Answer:

    A) w/w % of Fe – 2.44%

    B) w/w % of Mg – 4.590%

    C) w/w % of Ca – 96%

    Explanation:

    A) w/w % of Fe in limestone as Fe2O3 = (Mass of Fe2O3 /Mass of limestone) x 100

     0.0357/1.4639 X 100

    = 2.438 =2.44

    B) w/w % of Mg in limestone as Mg2P2O7 = (Mass of Mg2P2O7 /Mass of limestone) x 100

    = 0.0672/1.4639 X 100

    = 4.590

    C) w/w % of Ca in limestone as CaSO4 = (Mass of CaSO4/Mass of limestone) x 100

    = 1.4058/1.4639 X 100

    = 96

                                                               

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