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Acrylic acid (HC3H3O2) is used in the manufacture of paints and plastics. The pK

ID: 768280 • Letter: A

Question

Acrylic acid (HC3H3O2) is used in the manufacture of paints and plastics. The pKa of acrylic acid is 4.25. Calculate the pH in 0.160M acrylic acid. Express your answer using three significant figures. Calculate the concentration of H3O+ in 0.160M acrylic acid. Express your answer to two significant figures and include the appropriate units. Calculate the concentration C3H3O-2 in 0.160M acrylic acid. Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Part B) X^2 / 0.16-X = 10^-4.25 = 5.62 x 10^-5 ......=> X = 0.003 M ...=> [H+] = 0.003 M = [H3O+] Part C) HC3H3O2 ----> H+ + C3H3O2-.........=> The concentration of H+ and C3H3O2- are same and equal to X Therefore, [C3H3O2-] = 0.003 M

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