A 10.00 mL aliquot of vinegar (acetic acid, CH3COOH - 60.08 g/mol) was diluted in a 100.00 mL volumetric flask and made up with distilled water. An aliquot of 10.00 ml was pipetted into an erlenmeyer flask, to which two drops of phenolphthalein were added. This solution was then titrated with 0.1006 mol/L NaOH. i) Considering that the volume of NaOH consumed was 8.28 mL, what is the molar concentration of acid in dilute solution? ii) What is the acidity percentage of vinegar? iii) Whereas the expected concentration of the acetic acid solution was equal to 0.0830 mol/L, calculate the volume of NaOH needed to reach the point of equivalence.
A 10.00 mL aliquot of vinegar (acetic acid, CH3COOH - 60.08 g/mol) was diluted in a 100.00 mL volumetric flask and made up with distilled water. An aliquot of 10.00 ml was pipetted into an erlenmeyer flask, to which two drops of phenolphthalein were added. This solution was then titrated with 0.1006 mol/L NaOH.
i) Considering that the volume of NaOH consumed was 8.28 mL, what is the molar concentration of acid in dilute solution?
ii) What is the acidity percentage of vinegar?
iii) Whereas the expected concentration of the acetic acid solution was equal to 0.0830 mol/L, calculate the volume of NaOH needed to reach the point of equivalence.
iv) Based on the volume calculated in the previous item and the volume indicated in item (i), calculate the titration error.
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