Part A) you will be preparing a buffer solution. The solution is 50.0 mL of a...

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Question

Part A) you will be preparing a buffer solution.

The solution is 50.0 mL of a 0.200 M acetate buffer, pH 5.00, starting from a 1.00 M solution of acetic acid and solid sodium acetate.

pKa of acetic acid = 4.74

molar mass of sodium acetate = 82 g/mol

Hint: Use the Henderson-Hasselbach equation (Eq. 21)

Use the equation [salt] + [acid] = 0.200 M

Please calculate the number of mL of 1.00 M acetic acid and the number of grams of sodium acetate.

mL of 1.00M acetic acid = 0.05 mL

grams of sodium acetate = 0.050 grams

mL of 1.00M acetic acid = 3.6 mL

grams of sodium acetate = 0.53 grams

mL of 1.00M acetic acid = 0.071 mL

grams of sodium acetate = 0.13 grams

Part B) Please calculate the pH of a solution of 0.500 M CH₃COOH.

K_a = 1.8 x 10^-5

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Answer 1

Answer #1

Answer 2

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