Chemistry Question Easy?

👨🏻‍🏫 學術台化學

[匿名]

2016-02-26 7:32 pm

更新1:

According to the following reaction, how many moles of phosphoric acid will be formed upon the complete reaction of 0.157 moles diphosphorus pentoxide with excess water? P2O5 (s) + 3H2O (l) 2H3PO4 (aq) moles phosphoric acid

回答 (2)

賣女孩的火柴

2016-02-26 7:52 pm

P₂O₅(s) + 3H₂O(l) → 2H₃PO₄(aq)
1 mole of P₂O₅ gives 2 moles of H₃PO₄.

No. of moles of P₂O₅ = 0.157 mol
No. of moles of H₃PO₄ formed = 0.157 × 2 = 0.314 mol

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hcbiochem

2016-02-26 7:34 pm

0.157 mol P2O5 X (2 mol H3PO4 / 1 mol P2O5) = 0.314 mol H3PO4

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