Question

Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution: HC2H3O2 (aq) <--> C2H3O2- (aq) + H+ (aq). At equilibrium at 25 °C a 0.100 M solution of acetic acid has the following concentrations: [HC2H3O2] = 0.0990 M, [C2H3O2-] = 1.33x10-3 M, and [H+] = 1.33x10-3 M. What is the equilibrium constant, Kc, for the ionization of acetic acid at 25 °C? A. 5.71x10^4 B. 1.79x10^-5 C. 1.75x10^-7 D. 5.71x10^6 E. 0.100 Reset Selection

          Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution: HC2H3O2 (aq) <--> C2H3O2- (aq) + H+ (aq).
At equilibrium at 25 °C a 0.100 M solution of acetic acid has the following concentrations: [HC2H3O2] = 0.0990 M, [C2H3O2-] = 1.33x10-3 M, and [H+] = 1.33x10-3 M. What is the equilibrium constant, Kc, for the ionization of acetic acid at 25 °C?
A. 5.71x10^4
B. 1.79x10^-5
C. 1.75x10^-7
D. 5.71x10^6
E. 0.100
Reset Selection

Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution: HC2H3O2 (aq) <–> C2H3O2- (aq) + H+ (aq).
At equilibrium at 25 °C a 0.100 M solution of acetic acid has the following concentrations: [HC2H3O2] = 0.0990 M, [C2H3O2-] = 1.33x10-3 M, and [H+] = 1.33x10-3 M. What is the equilibrium constant, Kc, for the ionization of acetic acid at 25 °C?
A. 5.71x10^4
B. 1.79x10^-5
C. 1.75x10^-7
D. 5.71x10^6
E. 0.100
Reset Selection

Added by Marcus H.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Bridger Johnston

05/31/2022

Step 1

Step 1: Write the equilibrium expression for the dissociation of acetic acid: \[ K_c = \frac{[C2H3O2-][H+]}{[HC2H3O2]} \] Show more…

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Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution: HC2H3O2 (aq) <--> C2H3O2- (aq) + H+ (aq). At equilibrium at 25 °C a 0.100 M solution of acetic acid has the following concentrations: [HC2H3O2] = 0.0990 M, [C2H3O2-] = 1.33x10-3 M, and [H+] = 1.33x10-3 M. What is the equilibrium constant, Kc, for the ionization of acetic acid at 25 °C?