The rate of the reaction S+O2 →SO2 would increase if more of which of the follow- ing were added to the reaction vessel? 1. SO2 2. S, O2, and SO2 3. O2 4. S and O2 5. S

Explanation:

Assume the given reaction is in a state of equilibrium and balanced on a see-saw as follows:

                                                S+O₂ ⇄ SO₂  

                                                          Δ

If S & O₂ (answer choice 4) are added, the reactant side of the equilibrium would become unbalanced and the reaction see-saw tilt left, or to the reactant side. In this condition, the reaction would no longer be in equilibrium forcing the reaction chemistry to shift right toward the product side in order to establish a new equilibrium.

a