Consider a system that initially contains 0.100 mol each of the three species se

Question

Consider a system that initially contains 0.100 mol each of the three species seated in a 10.0-L container. The temperature is raised to a temperature where the equilibrium constant. K_c. is 15.7 for PCl_3(g) + Cl_2(g) PCl_5(g) Calculate the concentrations of all species after the system reaches equilibrium. Enter responses, and then click Submit. [PCl_3] = s M [Cl_2] = s M [PCl_5] = s M Answer the tutorial questions. The initial concentrations of each species is 0.01 M and Q = 100 s0 the reaction shifts to reach equilibrium. The completed ICe table is Enter a response and then click Submit.

Explanation / Answer

PCl3 + Cl2 --------> PCl5

initial 0.1 0.1 0.1

change -x -x +x

Equilibrium 0.1-x 0.1-x 0.1+x   

Kc =15.7

Kc = PCl5 / PCl3 x Cl2

15.7 = 0.1 + x / (0.1-x ) x (0.1-x)

15.7 = (0.1+x )/(0.1-x)2

On solving, x= 0.0146 moles

So, Conc of PCl3 = (0.1- 0.0146) / 10 L ==0.00854 M

conc of Cl2 = (0.1- 0.0146) /10 L = 0.00854 M

Conc of PCl5 = (0.1+ 0.0146) /10 L = 0.01146 M

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