Consider the reaction:
a solution initialy contains 0.210 M
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Solutions Manual for for Chemistry: Structure and Properties
- At some temperature. Kc = 33 for the reaction H2(g) + I2(g) 2 HI(g) Assume the initial concentrations of both H2 and I2 are 6.00 103 mol/L. Find the concentration of each reactant and product at equilibrium.arrow_forwardSuppose a reaction has the equilibrium constant K = 1.3 108. What does the magnitude of this constant tell you about the relative concentrations of products and reactants that will be present once equilibrium is reached? Is this reaction likely to be a good source of the products?arrow_forwardFor the reaction N2(g)+3H2(g)2NH3(g) show that Kc = Kp(RT)2 Do not use the formula Kp = Kc(RT)5n given in the text. Start from the fact that Pi = [i]RT, where Pi is the partial pressure of substance i and [i] is its molar concentration. Substitute into Kc.arrow_forward
- Cyclohexane, C6H12, a hydrocarbon, can isomerize or change into methylcyclopentane, a compound of the same formula (C5H9CH3) but with a different molecular structure. sssss The equilibrium constant has been estimated to be 0.12 at 25 C. If you had originally placed 0.045 mol of cyclohexane in a 2.8-L flask, what would be the concentrations of cyclohexane and methylcyclopentane when equilibrium is established?arrow_forwardDinitrogen tetroxide, N2O4, is a colorless gas (boiling point, 21C), which dissociates to give nitrogen dioxide, NO2 a reddish brown gas. N2O4(g)2NO2(g) The equilibrium constant Kc at 25C is 0.125. What percentage of dinitrogen tetroxidc is dissociated when 0.0400 mol N2O4 is placed in a 1.00-L flask at 25C?arrow_forwardA 2.0-L reaction flask initially contains 0.010 mol CO, 0.80 mol H2, and 0.50 mol CH3OH (methanol). If this mixture is brought in contact with a zinc oxide chromium(III) oxide catalyst, the equilibrium CO(g)+2H2(g)CH3OH(g) is attained. The equilibrium constant Kc for this reaction at 300C is 1.1 102. What is the direction of reaction (forward or reverse) as the mixture attains equilibrium?arrow_forward
- The equilibrium constant Kc for the reaction PCl3(g)+Cl2(g)PCl3(g) equals 4.1 at 300C. a A sample of 35.8 g of PCl5 is placed in a 5.0-L reaction vessel and heated to 300C. What are the equilibrium concentrations of all of the species? b What fraction of PCl5 has decomposed? c If 35.8 g of PCl5 were placed in a 1.0-L vessel, what qualitative effect would this have on the fraction of PCl5 that has decomposed (give a qualitative answer only; do not do the calculation)? Why?arrow_forwardThe decomposition of PCl5(g) to form PCl3(g) and Cl2(g) has Kc = 33.3 at a high temperature. If the initial concentration of PCl5 is 0.1000 M, what are the equilibrium concentrations of the reactants and products?arrow_forwardThe reaction 2 NO2(g) N2O4(g) has an equilibrium constant, Kc, of 170 at 25 C. If 2.0 103 mol of NO2 is present in a 10.-L. Flask along with 1.5 103 mol of N2O4, is the system at equilibrium? If it is not at equilibrium, does the concentration of NO2 increase or decrease as the system proceeds to equilibrium?arrow_forward
- At 2300 K the equilibrium constant for the formation of NO(g) is 1.7 103. N2(g) + O2(g) 2 NO(g) (a) Analysis shows that the concentrations of N2 and O2 are both 0.25 M, and that of NO is 0.0042 M under certain conditions. Is the system at equilibrium? (b) If the system is not at equilibrium, in which direction does the reaction proceed? (c) When the system is at equilibrium, what are the equilibrium concentrations?arrow_forwardWhat is the minimum mass of CaCO3 required to establish equilibrium at a certain temperature in a 6.50-L container if the equilibrium constant (Kc) is 0.050 for the decomposition reaction of CaCO3 at that temperature? CaCO3(s)CaO(s)+CO2(g)arrow_forwardThe equilibrium constant Kc, for the reaction 2 NOCI(g) 2 NO(g) + Cl2(g) is 3.9 103 at 300 C. A mixture contains the gases at the following concentrations: [NOCl] = 5.0 103 mol/L, [NO] = 2.5 103 mol/L, and [Cl2] = 2.0 103 mol/L. Is the reaction at equilibrium at 300 C? If not, in which direction does the reaction proceed to come to equilibrium?arrow_forward
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