An equilibrium reaction of the formula HA ↔ H+ + A- has an equilibrium constant of 13.5 and a [H+] = 0.500 M. What is the value of [HA]? (Show work)
A. 13.5 M
B. 54.0 M
C. 0.250 M
D. 0.018 M
![HA - H+ +A- ka= [H + 1[A-] [НА ] (па 1: (н* | |а| КА - о5) Co-5) 13. - о, о 18 м](http://img.homeworklib.com/questions/4ef282b0-7218-11ea-be39-fffd386b5582.png?x-oss-process=image/resize,w_560)
An equilibrium reaction of the formula HA ↔ H+ + A- has an equilibrium constant of...
Consider the equilibrium constant Kc for the reaction: N2O4(g) ↔ 2NO2(g) is 0.211 at 100°C. What is the value for the equilibrium constant is the reaction is balanced as ½ N2O4(g) ↔ NO2(g) ? A. 0.106 B. 0.459 C. 0.211 D. 0.422
Consider the equilibrium constant Kc for the reaction: N2O4(g) ↔ 2NO2(g) is 0.211 at 100°C. What is the value for the equilibrium constant if the reaction is reversed: 2NO2(g) ↔ N2O4(g) ? A. -0.211 B. 0.211 C. 4.74 D. -4.74
1) Consider the reaction: ??(?) + ??(?) ↔ ???(?). Suppose a sample of air contains initially [N2]=0.80M and [O2]=0.20M. Calculate the equilibrium concentration of all reactants and products at equilibrium. a. if Kc= 1.0x10-5 b. if Kc=1.20 2) Consider the following reaction: ??(?) + ?2?(?) ↔ ??2(?) + ?2(?) ?? = 107 (?? 500?) If a reaction mixture initially contains 0.125M CO and 0.125M H2O, what will be the equilibrium concentration of each of the reactants and products? 3) The...
Calculate the value for the equilibrium constant of this reaction: NH4+(aq)+HCO3-(aq)↔NH3(aq)+H2CO3(aq) where [NH4+]=0.25 M, [HCO3-]=0.42 M, [NH3]=0.0078 M, and [H2CO3]=0.018 M. answer= 1.3 *10^-3
Calculate the equilibrium equilibrium constant Kp for the reaction: N2 + 3H2 ↔ 2NH3, if the partial pressures of N2, H2, and NH3 are 1.20 atm, 1.97 atm, and 0.225 atm respectively. A. 0.055 B. 0.532 C. 0.952 D. 18.2
For the reaction 2 A(g) + 3 B(g) ↔ 2 C(g) + 2 D(g), the equilibrium constant at 298 K is 1.409×10-11. If the initial partial pressures of A, and B are 0.500 bar, and 0.718 bar, respectively, determine the partial pressure of D (in bar) once equilibrium has been reached at 298 K.
For the reaction H+(aq) + HCO3-(aq) ↔ H2CO3(aq), if the reaction is at equilibrium, which conditions must be maintained? A. [H2CO3] > [H+][HCO3-] B. [H2CO3] < [H+][HCO3-] C. [H2CO3] = [H+][HCO3-] D. none of the above
24. A hypothetical endothermic reaction, A2(aq) + B(aq) ↔ BA2(g), has an equilibrium constant of 2.3x10-4. A2 is yellow, B is clear, and BA2 is blue. If the reaction is at equilibrium and the volume is increased, which color will increase? a. Yellow b. Blue c. Neither d. Both
1. Write the equilibrium constant expression for the following reaction: H3PO4(aq) + 3 H2O(l) ↔ PO4 3- (aq) + 3 H3O+ (aq) 2. (LeChatlier’s principle) The following reaction has Kc = 4.2 x 102 at 325oC, all gases. PBr3 + Cl2 ↔ PCl3 + Br2 ΔHo = -47 kJ/mol a. For this reaction at equilibrium, [PBr3] = [Cl2] = 0.0273 M, and [PCl3] = [Br2] = 0.560 M. What do you expect to happen to the equilibrium concentrations of each...
14. A weak acid, (HA), has an acid dissociation constant of 2.50 . 10-6. A 25.00 ml sample with a concentration of 0.250 M is titrated with 0.150 M NaOH. a. Write the equation for the acid dissociation equilibrium. b. What is the pH of the original 0.250 M sample of HA? c. What is the percent ionization of the 0.250 M acid? d. Write the equation for the neutralization reaction. e. What is the pH after 12.00 ml 0.150M...