Saturday
November 22, 2014

Homework Help: chemistry

Posted by Nadz on Monday, November 11, 2013 at 8:49pm.

Phosphorus pentachloride, PCl5, reacts with water to form
phosphoric acid, H3PO4, and hydrochloric acid, HCl.
PCl5(s) + 4H2O() → H3PO4(aq) + 5HCl(aq)
(a) What mass of PCl5 is needed to react with an excess quantity of H2O
to produce 23.5 g of H3PO4?
(b) How many molecules of H2O are needed to react with 3.87 g
of PCl5?

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