Question

10) Kc is 1.67 1020 at 25°C for the formation of iron(III) oxalate complex ion: Fe3+(aq) + 3 C2042-(aq) = [Fe(C204)3β-(aq). If 0.160 M Fe3+ is initially mixed with 1.00 M oxalate ion, what is the concentration of Fe3+ ion at equilibrium? D) 6.81x 10-21 M A) 1.47 x 1020 M C) 1.04 x 1021 M B) 0.0100 M 11) Cyclohexane, C6H12, undergoes a molecular rearrangement in the presence of AlCl3 to form methylcyclopentane, CH3C5H9, according to the equation: C6H12- CH3C5Hg If Kc 0.143 at 25°C for this reaction, find the equilibrium concentrations of C6H12 and CH3C5H9 if the initial concentrations are 0.200 M and 0.200 M, respectively. A) [C6H12] = 0.150 M. [CH3C5H9] = 0.150 M B) IC6H121 0.050 M, [CH3C5H91 0.162 MM C) IC6H121 0.396 M, [CH3C5H9 0.004 M D) [C6H12] 0.350 M, [CH3C5H9-0.050 M 12) An equilibrium mixture of CO, O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0 0020 M O2. At this temperature, Kc equals 1.4 102 for the reaction: 2COg) +02g) -2 CO28) What is the equilibrium concentration of CO? B) 2.6 x 10-1 M C) 1.9 x 10-3 M D) 3.6 × 10-6 M A) 7.0% 10-2 M