What is the pH of a buffer solution made by the addition of 10.0g NaC2H3O2 to 10

Question

What is the pH of a buffer solution made by the addition of 10.0g NaC2H3O2 to 100mL acetic acid.
Assume that there's no change in volume when adding the salt to the acid. pKa for acetic acid is 4.74 What is the pH of a buffer solution made by the addition of 10.0g NaC2H3O2 to 100mL acetic acid.
Assume that there's no change in volume when adding the salt to the acid. pKa for acetic acid is 4.74
Assume that there's no change in volume when adding the salt to the acid. pKa for acetic acid is 4.74 Assume that there's no change in volume when adding the salt to the acid. pKa for acetic acid is 4.74 Assume that there's no change in volume when adding the salt to the acid. pKa for acetic acid is 4.74

Explanation / Answer

NaCH3COO molar mass= 82 grams/mol.

Moles of sodium ethanoate (acetate) = 10/82 mol= 0.12195 mol.

Moles of ethanoic acid (acetic acid) = 0.1x0.1 = 0.01 mol.

pH = pKa + log [(CH3COO-):(CH3COOH)]

pH = 4.74 + log (0.12195:0.01) = 5.83.

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