Lab 21: Titration Lab

Lab 21: Titration Lab

Set Up of the Lab


 Analayte at equivalence (pale pink)


Summary of Procedure:

The first step to this lab was rinsing the burette with water and then with the base NaOH. After rinsing, we filled the burette with 0.25 NaOH up to the 0mL line using a funnel. For the first trial, we measured out 7.08 mL of vinegar which was our acid and 20 mL of water. We added it to our erelymer flask and 5 drops of the phenolphthalein acid. We put in our magnetic stirrer and put the flask on top of our hot plate and turned on the spinner to 160 RMPs which started the automatic mixing. We added the NaOH in slow increments. For the first try, we went a few drops over using 23.20 mL of the base. We did repeated the steps but with 7.02 mL of the vinegar (acid) and used 24.21 mL of the base and we slowly dropped in the NaOh until it reached a faint pink color when the analayte reached equivalence. 

Data:


Percent Ionization:

[H3O+] / [CH3COOH] x 100 = 0.50%

The reason that the percent ionization is such a low number is because vinegar is a weak acid meaning that not all the molecules in the reactants disassociate into their ions into the product. 




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