Question & Answer: Thionyl chloride decomposes to Sulfur Dioxide and Chlorine gas: SO_2Cl_2_(g)==SO_2_(g) +…..

2. Thionyl chloride decomposes to Sulfur Dioxide and Chlorine gas: SOCl2(g) - The equilibrium constant for this reaction Ke is 0.000014. Calculate the equilibrium concentrations of each species if we start with 0.25M Thionly Chloride.

Thionyl chloride decomposes to Sulfur Dioxide and Chlorine gas: SO_2Cl_2_(g)==SO_2_(g) + Cl_2_(g) The equilibrium constant for this reaction K_c is 0.000014. Calculate the equilibrium concentrations of each species if we start with 0.25M Thionyl Chloride.

Expert Answer

Answer

Thionyl chloride decomposes to Sulfur Dioxide and Chlorine gas:

SO2Cl2(g) ——–> SO2 (g) + Cl2 (g)

Let’s make ICE table for the reaction

I 0.25 – –

C – x +x +x

E 0.25-x x x

Equilibrium constant for the reaction

Ke = [SO2] * [Cl2] / [SO2Cl2]

0.000014 = (x)*(x) / 0.25-x

0.0000035 = x^2

x = 0.00187

Equilibrium concentration of SO2Cl2 = 0.25-0.00187 = 0.248 M

Equilibrium concentration of SO2 = equilibrium concentration of Cl2 = x = 0.00187 M

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