Question

(a) (3 pts.) Shown below is plot of concentration as a function of time for the reaction A = B. What is the value of the equilibrium constant (Kc) for this reaction? 0.100 0.080 0.060 B 0.040 Concentration (M) A 0.020 0.000 0.00 1.00 2.00 3.00 4.00 5.00 Time (min) (b) (4 pts.) The following pictures represent the equilibrium state for four different reactions of the type A, + X 2 2 AX (X=B, C, D, E) A atoms are unshaded. X atoms are shaded. go 8.00 oo A, + B, A 2AB A + C F 2AC A, + D2 2AD A, + E 2AE Which reaction has the largest equilibrium constant? Explain your reasoning. © (7 pts.) At a certain temperature the equilibrium constant, Kc, equals 0.110 for the reaction: 2 ICI (8) = 12 (9) +Cl2 (9) What is the equilibrium concentration of ICT if 0.750 mol of 12 and 0.750 mol of Cl2 are initially mixed in a 1.00-L flask?

Answer 1

a kc - (B] late of forward we know kako Given, AB CAJ fromgraph (A] = 0.020 & [B]= 0.05 this concentations are the curves at parallel to each other ke=0.05 0.02 2.5 ke 6 A2+X2 22 AX 00 200 - Rate at backward Erm constant ✓ If ke g more equilibrium Constan is larger from the giren picture, products formation more in picture 1 iey A₂+B₂ DAB If is more for A₂ + b2 I ZAB, for this reaction equilibrium constant is larger