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
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
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.
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
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
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...
Which equilibrium constant expression(s) are for the following reaction. NH3(aq)↔NH3(g) Choose from the list below and enter the letters alphabetical order. (e.g. AH) A) (pNH3)eq F) (pNH3)eq2 B) [NH3]eq G) [NH3]eq-2 C) (pNH3)eq-1 H) (pNH3)eq-2 D) [NH3]eq-1 What is the equilibrium constant expression for the following reaction: Ru2+(aq) + 6NH3(aq)↔Ru(NH3)62+(aq) Choose from the list below and enter the letters alphabetical order. (e.g. For an equilibrium constant of [NH3]6eq[Ru2+]eq enter AH.) A) [Ru2+]eq E) [NH3]-1eq I) [Ru(NH3)62+]6eq B) [NH3]eq F) [Ru(NH3)62+]-1eq...
Given this reaction at equilibrium: N 2O 4 ↔ 2NO 2, calculate the equilibrium constant (K p) if the partial pressures of N 2O 4 and NO 2 are 0.0238 atm and 0.196 atm respectively. A. 1.61 B. 8.24 C. 0.00289 D. 0.621
a. Write the reaction for a monoprotic acid HA with water and its equilibrium constant expression (K) b. Write the reaction for the conjugate base of HA with water and its equilibrium constant expression (Kb) c. Write the reaction for the auto-ionization of water and its equilibrium constant expression (Kw) d. Use the equilibrium expressions for Ka and Ko to prove that K Kb = Kw. What is the physical significance of the KaKb = Kw relationship?