Acetic acid, CH3CO2H, is the solute that gives vinegar its characteristic odor a

Question

Acetic acid, CH3CO2H, is the solute that gives vinegar its characteristic odor and sour taste.
Part C: Calculate the pH in 0.185 M CH3CO2H.
Part D: Calculate the concentrations of all species present (H3O+, CH3CO2?, CH3CO2H, and OH?) in 0.185 M CH3CO2H.

Part C Acetic acid, CH3 CO2H, is the solute that gives vinegar its characteristic odor and sour taste. Calculate the pH in 0.185 M CH3 CO2H Express your answer using two decimal places. pH- SubmitP uest Ans XIncorrect; Try Again; 3 attempts remaining Part D Calculate the concentrations of all species present (HgO+, CH3 CO2, CH3 CO2H, and OH) in 0.185 M CH3 CO H. Express your answers using two significant figures separated by commas. Enter your answers in order listed in the question H30' , CH3C02-, CH3C02 H, ??-- Submit

Explanation / Answer

Part C)

[CH3CO2H] = 0.185 M

CH3CO2H + H2O <==> CH3CO2- + H3O+

let x amount reacted

Ka = [CH3CO2-][H3O+]/[CH3CO2H]

1.8 x 10^-5 = x^2/0.185

x = [H3O+] = 1.82 x 10^-3 M

pH = -log[H3O+] = -log(1.82 x 10^-3) = 2.74

Part D) concentration of,

[H3O+] = 1.82 x 10^-3 M

[OH-] = 1 x 10^-14/1.82 x 10^-3 = 5.49 x 10^-12 M

[CH3CO2H] = 0.185 - 1.82 x 10^-3 = 0.18318 M

[CH3CO2-] = 1.82 x 10^-3 M

Answer : 1.82 x 10^-3 M, 1.82 x 10^-3 M, 0.18318 M, 5.49 x 10^-12 M

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