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Question

Chemistry Question on Equilibrium

What is KcK_c for the following equilibrium when equilibrium concentration of each substance is [SO2]=0.60M,[O2]=0.82M[SO_2] = 0.60 M, [O_2] = 0.82 M and [SO3]=1.90M? [SO_3] = 1.90 M? \hspace10mm 2SO_2 (g)+O_2(g) \rightleftharpoons 2SO_3 (g)

A

12.229

B

21.229

C

12.922

D

21.046

Answer

12.229

Explanation

Solution

For equation \hspace10mm 2SO_2 (g)+O_2(g) \rightleftharpoons 2SO_3 (g) \hspace25mm K_c=\frac{[SO_3]^2}{[SO_2]^2 [O_2]} \hspace30mm =\frac{[1.90\, M]^2}{[0.60\, M]^2 [0.82\, M]} \hspace30mm = 12.299\, M^{-1} or 12.229 L mol−112.229\, L\, mol^{-1}