Exp%205%20grading%20-%20potentiometry%20-%20f06 -...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Experiment 5 - Potentiometric Titrations Name___________________________ Report Sheet Partners________________________ (12 points total) ________________________________ 1) Table 1. Titration data for various acids. 2pt for completing the table. initial pH pH at ½ equivalence Volume at equivalence final pH 0.010 M HCl 0.020 M HCl 0.030 M HCl 0.010 M CH 3 COOH 0.020 M CH 3 COOH 0.030 M CH 3 COOH 0.010 M HCOOH 0.020 M HCOOH 0.030 M HCOOH 0.005 M HOOCC 2 H 2 COOH 0.010 M HOOCC 2 H 2 COOH 0.020 M HOOCC 2 H 2 COOH Results and Discussion: 2) Which of the acids studied are weak? Which are strong? How can you tell from the data? 2pt. weak acids- acetic, formic, maleic strong acid- hydrochloric might comment on any of the following: difference in initial pH, shapes of titration curves, magnitude of Ka, etc. 3) Calculate the pKa for the three weak acids from the Ka values given in the lab manual. How do the experimentally determined pKa’s compare with the calculated values?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/12/2011 for the course CHEM 1A taught by Professor Nitsche during the Fall '08 term at University of California, Berkeley.

Page1 / 2

Exp%205%20grading%20-%20potentiometry%20-%20f06 -...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online