Question

The balanced chemical equation for the reaction between pcl5 and water is given below. if 3.45 moles of hcl are produced, how many moles of water reacted? pcl5(aq) + 4 h2o (l)→h3po4(aq) + 5 hcl (aq)

Answer 1

The number of water moles reacted is = 2.76 moles

calculation

PCl5 + 4H2O = H3PO4 + 5 HCl

moles of HCl produced = 3.45 moles , by use of mole ratio between H2O: HCl which is 4:5

the moles of H2O is therefore = 3.45 x4/5 = 2.76 moles