(aq) K, = =1.5x 10 [H,Co, (a)] HCO, (aq) + H;O0) co? (aq) + H.O(aq) (aq) 4.69 x 10 [HCo, (n What is the equilibrium constant for this reaction? CO.(aq) + 2H,0(1) HCO, (aq) + H,O (aq) K-? (A) K x Ki (B) Kux K: (C) Ku/Ka (D) Ku/ K. . Which equation represents the charge balance equation for the dissolution of CaCO, in aqueous solution. (A) (Ca']- [HCO, 1+[CO1 (B) 2(Ca] + [H')-[OH ]+ 2[CO, ) (C) [Ca"] + [H']= [OH ]+ [HCO, 1+[CO? ] (D) 2(Ca"] + (H")- [OH ]+ (HCO; 1+ 2[CO) ). In the dissociation of a monoprotic weak acid in aqueous solutions, HA, which leads to the assumption that (H']= (A? (A) The autoprotolysis of water is the dominant source of (H'). (B) The concentration of the acid is sufficiently high such that the dissociation of the acid is the dominant source of (H"). (C) The concentration of the acid has no effect on the approximation; [H'] is always approximately equal to (A). (D) The anion, A is also a weak base. 1. The pK, value for formic acid (HCOOH) is 3.74. Calculate the pH of a 0.25 M solution of sodium formate, the conjugate base of formic acid. Assume the activity coefficients are equal to 1.00. (A) 2.18 (B) 5.43 (C) 8.57 (D) 11.82

(aq) K, = =1.5x 10 [H,Co, (a)] HCO, (aq) + H;O0) co? (aq) + H.O(aq) (aq) 4.69 x 10 [HCo, (n What is the equilibrium constant for this reaction? CO.(aq) + 2H,0(1) HCO, (aq) + H,O (aq) K-? (A) K x Ki (B) Kux K: (C) Ku/Ka (D) Ku/ K. . Which equation represents the charge balance equation for the dissolution of CaCO, in aqueous solution. (A) (Ca']- [HCO, 1+[CO1 (B) 2(Ca] + [H')-[OH ]+ 2[CO, ) (C) [Ca"] + [H']= [OH ]+ [HCO, 1+[CO? ] (D) 2(Ca"] + (H")- [OH ]+ (HCO; 1+ 2[CO) ). In the dissociation of a monoprotic weak acid in aqueous solutions, HA, which leads to the assumption that (H']= (A? (A) The autoprotolysis of water is the dominant source of (H'). (B) The concentration of the acid is sufficiently high such that the dissociation of the acid is the dominant source of (H"). (C) The concentration of the acid has no effect on the approximation; [H'] is always approximately equal to (A). (D) The anion, A is also a weak base. 1. The pK, value for formic acid (HCOOH) is 3.74. Calculate the pH of a 0.25 M solution of sodium formate, the conjugate base of formic acid. Assume the activity coefficients are equal to 1.00. (A) 2.18 (B) 5.43 (C) 8.57 (D) 11.82

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.71PAE: Acrylic acid is used in the polymer industry in the production of acrylates. Its K, is 5.6 X 10“’....

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