Many grams of #H_3PO_4# are produced when 12.0 moles of water react with an excess of #P_4O_10#? #P_4O_10(s) + 6H_2O(l) -> 4H_3PO_4(aq)#?

1 Answer
Apr 30, 2017

Answer:

You have the stoichiometric equation..........

Explanation:

And, by the stoichiometry, if #"12 mole"# of water react, then #"8 mole"# of #"phosphoric acid"# will result, and this constitutes a mass of.............

#12*molxx97.99*g*mol^-1~=1200*g#

When you use #P_4O_10# in the lab (and it is often used as a dessicant), usually when you take the lid off a pre-used jar, you will often notice a syrupy crust of phosphoric acid on top of the powder. You have to dig down beneath this crust to get to the free-flowing powder.

Of what do you think the syrupy crust is composed?