Bohlen exp. 5

Bohlen exp. 5 - Experiment 5 Conductometric Titration Name...

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Experiment 5 – Conductometric Titration Name Peter Bohlen Lab Day and Time Monday 1pm TA Ioana Rus Section 402 Documentation Experiment 5 – Conductometric Titration Grading Rubric Possible Points Points Received Introduction 10 Purpose of report Goals of the experiment Materials and Methods 20 Describe procedure in paragraph format following guidelines provided (-2 for each type of mistake) Results and Discussion 50 Inserted titles for tables Inserted graphs into template Inserted captions for each graph Showed complete sample calculations Summarized all data in tables Answered questions completely Error analysis Laboratory Technique 20 TOTAL (100) TA Comments/Suggestions:
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C HEMISTRY 11L R EPORT T EMPLATE EXPT. Conductometric Titration 5 Introduction The purpose of this report is to determine the conductometric titration of calcium hydroxide with phosphoric acid and compare conductivity vs. volume. The objective of the experiment was to use a conductometric titration to determine the amount of phosphoric acid needed to titrate the calcium hydroxide. Materials and Methods Data Collection- Gross trial The first step of the process was to make a solution of Calcium Hydroxide. This was done by measuring an exact amount of calcium hydroxide, .051grams, and then adding it to .250 liters of water. The molairty of this solution was then found by doing moles over volume. An amount of . 05grams +/- .01 grams was needed in order to make sure that the solution was saturated. After the solution was made, 50ml of the solution was extracted and put into a beaker. The stir rod was inserted into the beaker to increase the movement of the solution. A buret filled with phosphoric acid solution was placed over the beaker, and adding small amounts of the phosphoric acid, .5-1ml at a time, the conductivity was then measured after a minute. The conductivity measured was then graphed against a inserted change of volume in the phosphoric acid buret. When the conductivity came to a minimum, and started to go up again, the volume value was recorded. The volume recorded was the approximate
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This note was uploaded on 11/03/2009 for the course BIOL 90726 taught by Professor Weakley during the Spring '09 term at UNC.

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Bohlen exp. 5 - Experiment 5 Conductometric Titration Name...

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