theoretical yield can be determined using the equation for electrolysis of water and the mass
2H2O --> 2H2 + O2
mole of water is 78.5g/18gmol-1 = 4.36
mole ratio of H2O:H2 is 2:2 i.e. same moles. mole of H2 is 4.36x2 = 8.72moles
Theoretical mass or yield of Hydrogen is nMr = 8.72moles x 1 = 8.72g.
experimental yield is given as 3.23g
percentage yield is
(experimental/theoretical)X 100%
hope that helps
Determine the theoretical and percent yield of hydrogen gas if 78.5 g water undergoes electrolysis to produce hydrogen and oxygen and 3.23 g hydrogen is collected.
2 answers
correction: theoretical mass is 8.72moles x 2 = 17.44g