How many grams of sodium phosphate are formed by the reaction of 10 g of sodium with phosphoric acid?

Question

How many grams of sodium phosphate are formed by the reaction of 10 g of sodium with phosphoric acid?

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Khang Minh 3 years 2021-08-26T13:47:56+00:00 1 Answers 13 views 0

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  1. Sigrid
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    2021-08-26T13:49:39+00:00
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    Answer:

    23.8g of sodium phosphate are formed

    Explanation:

    Based on the reaction of sodium, Na, with phosphoric acid, H₃PO₄:

    3Na + H₃PO₄ → Na₃PO₄ + 3/2 H₂

    3 moles of sodium produce 1 mole of sodium phosphate

    To solve this question we must find the moles of sodium in 10g. Using the chemical reaction we can find the moles -And the mass- of sodium phosphate produced, as follows:

    Moles Na -Molar mass: 22.99g/mol-

    10g * (1mol / 22.99g) = 0.435 moles Na

    Moles Na₃PO₄:

    0.435 moles Na * (1mol Na₃PO₄ / 3mol Na) = 0.145 moles Na₃PO₄

    Mass Na₃PO₄ -Molar mass: 163.94g/mol-

    0.145 moles Na₃PO₄ * (163.94g/mol) =

    23.8g of sodium phosphate are formed

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