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29 December, 10:19

How many grams of H3PO4 are produced when 10.0 moles of water react with an excess of P4O10?

P4O10 (s) + 6H2O (l) → 4H3PO4 (aq)

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  1. 29 December, 10:30
    0
    652.6 g of H₃PO₄ are formed

    Explanation:

    Reaction is:

    P₄O₁₀ (s) + 6H₂O (l) → 4H₃PO₄ (aq)

    As P₄O₁₀ is the reactant in excess, the limiting is water.

    Ratio is 6:4. We make a rule of three:

    6 moles of water produce 4 moles of phosphoric acid

    Therefore, 10 moles of water may prodyce (10.4) / 6 = 6.66 moles of H₃PO₄

    We convert the moles to mass:

    6.66 moles. 97.9 g / 1mol = 652.6 g
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