The Student Room Group

AS chemistry calculation question

In the method to produce phosphoric(V) acid, 3.50 kg of Ca3(PO4)2 are added to an excess of aqueous sulfuric acid.
Ca3(PO4)2(s) + 3H2SO4(aq) 2H3PO4(aq) + 3CaSO4(s) 1.09 kg of phosphoric(V) acid are produced.
Calculate the percentage yield of phosphoric(V) acid.
where do i even begin??
Find number of moles of Ca3(PO4)2 using mass/mr
use 1:2 ratio to find moles of phosphoric acid
find mass of acid where mass=moles*mr=theoretical yield
percent yield =actual yield/theoretical yield

Quick Reply

Latest