UNC-Chapel Hill CHEM 101 - exp 5 (4 pages)

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exp 5

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Pages:
4
School:
University of North Carolina at Chapel Hill
Course:
Chem 101 - General Descriptive Chemistry I
General Descriptive Chemistry I Documents

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CHEMISTRY 101L DATA SUMMARY EXPT 5 Conductometric Titration Name name Lab Section 432 Introduction Figure 1 The conductivity minimum is 33 S at 4 47mL and this graph shows how from this minimum it will increase from this point on It will actually increase all the way to 164 S which is close to what it was initially at the beginning It s noticeable how the conductivity is almost where it was at the beginning Data Table 1 Volume and Conductivity Gross Volume of Buret Gross mL 7 1 mL 7 61 mL 8 18 mL 8 52 mL 9 02 mL 9 66 mL 10 18 mL Corrected Volume Gross mL 0 mL 0 51 mL 1 08 mL 1 42 mL 1 92 mL 2 56 mL 3 08 mL Conductivity Gross S 166 S 152 S 134 S 122 S 98 S 72 S 49 S 10 65 mL 11 09 mL 11 57 mL 12 08 mL 12 69 mL 13 23 mL 14 mL 3 55 mL 3 99 mL 4 47 mL 4 98 mL 5 59 mL 6 13 mL 6 9 mL 37 S 34 S 33 S 56 S 94 S 122 S 164 S Figure 2 The conductivity minimum on this graph is 17 S at 4 23mL and this graph shows how it changes and continues to increase from the minimum all the way to 205 Although the conductivity sensitive was decreasing rather slowly when it reached the minimum it started to increase rather rapidly It s noticeable in this trial how the conductivity at the end exceeded what it was at the start Data table 2 Volume and Conductivity Sensitive Volume of Buret Sensitive mL Corrected Volume Sensitive mL 14mL 15 01mL 16 01mL 16 26mL 0 mL 1 01 mL 2 01 mL 2 26 mL Conductivity Sensitive S 122 S 107 S 84 S 73 S 16 5mL 16 72mL 16 95mL 17 21mL 17 36mL 17 5mL 17 62mL 17 71mL 17 8mL 17 91mL 18 06mL 18 18mL 18 23mL 18 4mL 19 9mL 20 62mL 21 52mL 22 63mL 2 5 mL 2 72 mL 2 95 mL 3 21 mL 3 36 mL 3 5 mL 3 62 mL 3 71 mL 3 8 mL 3 91 mL 4 06 mL 4 18 mL 4 23 mL 4 4 mL 5 9 mL 6 62 mL 7 52 mL 8 63 mL 65 S 56 S 45 S 36 S 31 S 28 S 26 S 23 S 21 S 19 S 18 S 17 S 17 S 25 S 84 S 115 S 150 S 205 S Calculations Trial 2 X mlx b y m2x b2 m1x b1 m2x b2 Y1 28 141x 130 82 y2 41 963x 161 54 28 141x 130 82 41 963x 161 54 28 141x 41 963x 161 54 130 82 X 28 141 41 963 161 54 130 82 x 161 54 130 82 28



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