completitsummary - Fundamental Principles: o H 3 O + + OH-...

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Complexometric Titrations Author: Steven Hagedon Lab Partners: Danielle Nguyen, Ashley Cox, And Grishma Sheth Instructor: Yan Zhao Chemistry 104B, Section 027 Date Work Performed: February 26, 2008 Date Work Submitted: March 4, 2008 Results Volume  Start  (mL) Volume  End  (mL) Total  Volume  (mL) EDTA  Used (g) [M +n ] (mol/ L) g CaCO 3 Volume  sample  (mL) Sample  (g) Sample  ppm Trial 1 0.00 6.50 6.50 1.862 0.008255 2.4125 10 6.50 371153.8 Trial 2 6.50 12.50 6.00 1.862 0.007620 2.2270 10 6.00 371157.5 Trial 3 12.50 18.50 6.00 1.862 0.007620 2.2270 10 6.00 371157.5 Trial 4 N/A N/A N/A N/A N/A N/A N/A N/A N/A Average 6.33 12.50 6.17 1.862 0.007832 2.2888 10.00 6.17 371156.27 Standard Deviatio n of volume of EDTA .2887 % RSD of volume of EDTA 3.99
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Calculations: See Attached Pages Steven Hagedon Danielle Nguyen, Ashley Cox, Grishma Sheth Yan Zhao Chem 104B Mar-3-08 Ion-Exchange Chromatography Problem to be Solved To determine the amount of moles of hydronium ions that are released by a cation-exchange column, with acid.
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Unformatted text preview: Fundamental Principles: o H 3 O + + OH- 2H 2 O o Moles H 3 O + = moles OH-o Moles PC in sample = moles H 3 O + released from the column o Ion-exchange chromatography depends on the ion-exchange resin, synthetic polymer. o Cation-exchange resin has many weak acid molecules attached to the resin Procedure 1. Use the NaOH which was standardized before today 2. Prepare Column as per the instruction manual 3. Perform the column regeneration as per the instruction manual 4. Load a sample on to the regenerated column a. See the instruction manual for the instructions 5. Titrate each sample separately using a standard strong acid and strong base titration. Table of Data List of Samples Titration Volumes Total Positive charge in samples Amount of waste solution Amount of Distilled Water in step 4...
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This note was uploaded on 04/02/2008 for the course CHEM 104B taught by Professor Staff during the Spring '07 term at University of Arizona- Tucson.

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completitsummary - Fundamental Principles: o H 3 O + + OH-...

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