Rate of Disappearance Help

Question

Hydrogen sulfide burns in oxygen to form sulfur dioxide and water. If sulfur dioxide is being formed at a rate of 0.155579235977 mol L^-1 s^-1, what are the rates of disappearance of hydrogen sulfide and oxygen?

Rate of disappearance of O₂ is ?

Rate of disappearance of H₂S is ?

Answer 1

Write the pertinent reaction. The relation of the rates of i and j are r_j, = (ν_j/ν_i) where the ν_i is the stoichiometric coefficient of i and r_i is the rate of appearance of i. If the species, i, is a reactant, it has a negative stoichiometric coefficient, and if a species is reacting, it has a negative reaction rate.

Equation is H₂S + (3/2)O₂ → SO₂ + H₂O or 2H₂S + 3O₂ → 2SO₂ + 2H₂O

Given r_SO2 = x we see that r_H2O = x r_H2S = -x and r_O2 = -(3/2) x