Question

what is the equilibrium constant for the reaction so₂(g) + no₂(g) ⇌ so₃(g) + no(g)?

a. k_eq = so₂no₂/so₃no
b. k_eq = so₃no/so₂no₂
c. k_eq = so₃so₂/nono₂
d. k_eq = so₃no/so₂no₂

Explanation:

Step1: Recall equilibrium - constant formula

For a general reaction \(aA + bB
ightleftharpoons cC + dD\), the equilibrium - constant expression \(K_{eq}=\frac{[C]^c[D]^d}{[A]^a[B]^b}\), where \([A]\), \([B]\), \([C]\), and \([D]\) are the molar concentrations of the reactants and products at equilibrium, and \(a\), \(b\), \(c\), and \(d\) are the stoichiometric coefficients.

Step2: Identify reactants and products for the given reaction

For the reaction \(SO_2(g)+NO_2(g)
ightleftharpoons SO_3(g)+NO(g)\), the reactants are \(SO_2\) and \(NO_2\), and the products are \(SO_3\) and \(NO\). The stoichiometric coefficients of all species are 1.

Step3: Write the equilibrium - constant expression

Using the formula from Step1, \(K_{eq}=\frac{[SO_3][NO]}{[SO_2][NO_2]}\).

Answer:

D. \(K_{eq}=\frac{[SO_3][NO]}{[SO_2][NO_2]}\)