Titration Lab Report

Superior Essays
Lab 14/ Test 6: Determination of Acid Dissociation Constants through Titration
Sabrina Tom

I.Abstract The two unknown solutions A and E were titrated with NaOH solutions. For each solution, one fast and three slow titrations were done to see where the pH rose exponentially. The unknown solutions A and E were determined to be Pyridinium ion acid and oxalic acid, respectively.

II.Theories One significant concept throughout this lab is titrations. A titration is a lab method analyzes a solution of a known concentration to determine the concentration of a known solution. The solution of the known concentration (also called the titrant) is slowly added from the buret to the beaker containing the unknown solution. The addition of the known
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CONCLUSION

To find the unknown solutions, I compared the calculated pKa’s to the pKa’s of acids listed on this website: http://clas.sa.ucsb.edu/staff/Resource%20Folder/Chem109ABC/Acid,%20Base%20Strength/Table%20of%20Acids%20w%20Kas%20and%20pKas.pdf . Pyridinium ion acid had the closest pKa (5.25) to solution A (5.16) and oxalic acid (4.19) had the closest to unknown E(4.39).

The Ve = 50 mL because (50 x 0.05)/ 0.05= 50.
At Vb=0, pH = 3.28 because Ka = x^2 / (.5-x) and

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