Concentration of Acetic Acid in Vinegar
Nalebra Barnett, AAHCA, BSHA
University of Central Oklahoma
General Chemistry II Lab
March 28, 2017
Dr. Lane Whitesell
Lab 12. Concentration of Acetic Acid in Vinegar. This laboratory is to determine the concentration of acetic acid in vinegar using molarity and percent by mass of acetic acid in vinegar. This means, vinegar is a crucial solution of acetic acid (HC2H302) in water. Molarity (in mole/L), or mass percent expressed the concentration of the acetic acid in vinegar where; Molarity = Moles of Acetic Acid / Volume of Vinegar (in L).
Mass % = [Mass of Acetic Acid / Mass of Vinegar] x 100. In this experiment, titration will be used to determine the concentration of acetic acid in vinegar. A titration determines the performance of the controlled reaction between a solution of the known concentration (titrant), and a solution of the unknown concentration (analyte). The titrant is an aqueous …show more content…
A burette gives a precise measurement of a specific volume of a solution. The NaOH will be added to the vinegar sample until all the acetic acid in the vinegar has been completely ionized. At this moment; the reaction is completed, no more NaOH is required because we are now at the equivalence point of the titration. An indicator solution called phenolphthalein is added to the vinegar at the beginning of the titration, and this is to indicate when the equivalence point has been met. Phenolphthalein is a pH sensitive organic dye that is colorless in acidic solutions like vinegar, and deep pink in basic solutions like sodium hydroxide. One drop of NaOH should be at the equivalence point of the titration, it will cause the solution in the Erlenmeyer flask from colorless to a very pale pink. While the titration is performed, collect the following
Nalebra Barnett, AAHCA, BSHA
University of Central Oklahoma
General Chemistry II Lab
March 28, 2017
Dr. Lane Whitesell
Lab 12. Concentration of Acetic Acid in Vinegar. This laboratory is to determine the concentration of acetic acid in vinegar using molarity and percent by mass of acetic acid in vinegar. This means, vinegar is a crucial solution of acetic acid (HC2H302) in water. Molarity (in mole/L), or mass percent expressed the concentration of the acetic acid in vinegar where; Molarity = Moles of Acetic Acid / Volume of Vinegar (in L).
Mass % = [Mass of Acetic Acid / Mass of Vinegar] x 100. In this experiment, titration will be used to determine the concentration of acetic acid in vinegar. A titration determines the performance of the controlled reaction between a solution of the known concentration (titrant), and a solution of the unknown concentration (analyte). The titrant is an aqueous …show more content…
A burette gives a precise measurement of a specific volume of a solution. The NaOH will be added to the vinegar sample until all the acetic acid in the vinegar has been completely ionized. At this moment; the reaction is completed, no more NaOH is required because we are now at the equivalence point of the titration. An indicator solution called phenolphthalein is added to the vinegar at the beginning of the titration, and this is to indicate when the equivalence point has been met. Phenolphthalein is a pH sensitive organic dye that is colorless in acidic solutions like vinegar, and deep pink in basic solutions like sodium hydroxide. One drop of NaOH should be at the equivalence point of the titration, it will cause the solution in the Erlenmeyer flask from colorless to a very pale pink. While the titration is performed, collect the following