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15 April, 01:34

Phosphorus occurs naturally in the form of fluorapatite, CaF2 ∙ 3Ca3 (PO4) 2. The dot indicates 1 part CaF2 to 3 parts Ca3 (PO4) 2. This mineral is reacted with an aqueous solution of H2SO4 in the preparation of a fertilizer. The products are phosphoric acid, hydrogen fluoride, and gypsum, CaSO4 ∙ 2H2O. Write the balanced equation describing this process.

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  1. 15 April, 01:49
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    CaF2 * 3Ca3 (PO4) 2 + 10 H2SO4 + 20 H2O ⇔6 H3PO4 + 2 HF + 10 CaSO4 * 2H2O

    Explanation:

    We have CaF2 * 3Ca3 (PO4) 2 that will react with an aqueos solution of H2SO4

    This will form the following product H3PO4 + HF and CaSO4 * 2H2O

    CaF2 * 3Ca3 (PO4) 2 + 10 H2SO4 + 20 H2O ⇔6 H3PO4 + 2 HF + 10 CaSO4 * 2H2O

    We have on both sides:

    10x Ca

    2x F

    6x P

    84x O

    40x H

    10x S

    The reaction cannot be more simplified
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