What is the pH of a solution that is 0.785 M in acetic acid and 0.451...

Question

Question

What is the pH of a solution that is 0.785 M in acetic acid and 0.451 M is sodium acetate. The K_a for acetic acid is 1.8 x 10^-5 .

science chemistry

Answer 1

Answer #1

Ka = 1.8 * 10^-5

PKa = -log(Ka)

= -log(1.8 * 10^-5)

= 4.74

Ph = Pka + log (Salt /Acid)

Ph = 4.74 + log(0.451 / 0.785)

= 4.74 + log(0.574)

= 4.74 - 0.24

= 4.50

Correct answer :- B

Answer 2

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