In an equilibrium A + B C + D; A and B are mixed in a vessel at temperature T. Theinitial concentration of A was twice the initial concentration of B. After the equilibrium has

reached, concentration of C was thrice the equilibrium concentration of B. Calculate KC.

Dear user,Let the initial concentration of B  be X and concentration of C and D be Yat equilibrium.Then,writing the equation,                                  A + B         C + DInitial :                   2X     X              0       0Final :            2X-Y    X-Y         Y      YAccording to question,          Y/X-Y =3                  Y=3X/4Therefore, Kc=(3X/4)2/5X/4×X/4                    Kc= 9/5                       =1.8

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