1.

Phosphoric acid (H3PO4) is prepared in a two-step process:(1) P4+5O2→P4O10(2) P4O10+6H2O→4H3PO4In step (1), 62 g of phosphorus is made to react with excess oxygen to form P4O10 with 85 % yield. In step (2), the yield of H3PO4 obtained is 90 %. Calculate the mass of H3PO4 produced.

Answer»

Phosphoric acid (H3PO4) is prepared in a two-step process:

(1) P4+5O2P4O10

(2) P4O10+6H2O4H3PO4

In step (1), 62 g of phosphorus is made to react with excess oxygen to form P4O10 with 85 % yield. In step (2), the yield of H3PO4 obtained is 90 %. Calculate the mass of H3PO4 produced.



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