Concrete used in smokestacks has to be designed to withstand sometimes caustic conditions. Sulfur oxides are produced in some cases, for example, and they would establish equilibrium if they did not disperse:

Write the equilibrium expression for this reaction.

Strategy We use the definition of the equilibrium expression. Write the products in the numerator and the reactants in the denominator. The exponent for each concentration term is given by the corresponding stoichiometric coefficient from the chemical equation.

Transcribed Image Text:

2 SO₂(g) + O₂(g) 2 SO3(g)