An Introductory Course of Quantitative Chemical Analysis by Henry P. Talbot (superbooks4u txt) π
NOTEBOOKS
Notebooks should contain, beside the record of observations,descriptive notes. All records of weights should be placed upon theright-hand page, while that on the left is reserved for the notes,calculations of factors, or the amount of reagents required.
The neat and systematic arrangement of the records of analyses isof the first importance, and is an evidence of careful work and anexcellent credential. Of two notebooks in which the results may be,in fact, of equal value as legal evidence, that one which is neatlyarranged will carry with it greater weight.
All records should be dated, and all observations should be recordedat once in the notebook. The making of
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| Corrected | Corrected
Final Reading HCl | 46.36 46.29 | 40.51 40.37
Initial Reading HCl | 1.75 1.75 | .50 .50
| ββ- ββ- | ββ- ββ-
| 44.54 | 39.87
| |
log cc. NaOH | 1.6468 | 1.6008
colog cc. HCl | 8.3192 | 8.3668
| βββ | βββ
| 9.9680 - 10 | 9.9676 - 10
1 cc. HCl | .9290 cc. NaOH | .9282 cc. NaOH
Mean | .9286 |
_________________________|________________________|________________________
Signed
!Page C!
Date
STANDARDIZATION OF HYDROCHLORIC ACID
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| |
Weight sample and tube| 9.1793 | 8.1731
| 8.1731 | 6.9187
| βββ | βββ
Weight sample | 1.0062 | 1.2544
| |
Final Reading HCl | 39.97 39.83 | 49.90 49.77
Initial Reading HCl | .00 .00 | .04 .04
| ββ- ββ- | ββ- ββ-
| 39.83 | 49.73
| |
Final Reading NaOH | .26 .26 | .67 .67
Initial Reading NaOH | .12 .12 | .36 .36
| β- β- | β- β-
| .14 | .31
| |
| .14 | .31
Corrected cc. HCl | 39.83 - ββ- = 39.68 | 49.73 - ββ- = 49.40
| .9286 | .9286
| |
log sample | 0.0025 | 0.0983
colog cc | 8.4014 - 10 | 8.3063 - 10
colog milli equivalent| 1.2757 | 1.2757
| βββ | βββ
| 9.6796 - 10 | 9.6803 - 10
| |
Normal value HCl | .4782 | .4789
Mean | .4786 |
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Signed
!Page D!
Date
DETERMINATION OF CHLORINE IN CHLORIDE, SAMPLE No.
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Weight sample and tube| 16.1721 | 15.9976
| 15.9976 | 15.7117
| βββ- | βββ-
Weight sample | .1745 | .2859
| |
Weight crucible | |
+ precipitate | 14.4496 | 15.6915
Constant weights | 14.4487 | 15.6915
| 14.4485 |
| |
Weight crucible | 14.2216 | 15.3196
Constant weight | 14.2216 | 15.3194
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Weight AgCl | .2269 | .3721
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log Cl | 1.5496 | 1.5496
log weight AgCl | 9.3558 - 10 | 9.5706 - 10
log 100 | 2.0000 | 2.0000
colog AgCl | 7.8438 - 10 | 7.7438 - 10
colog sample | 0.7583 | 0.5438
| βββ- | βββ-
| 1.5075 | 1.5078
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Cl in sample No. | 32.18% | 32.20%
| |
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Signed
STRENGTH OF REAGENTSThe concentrations given in this table are those suggested for use in the procedures described in the foregoing pages. It is obvious, however, that an exact adherence to these quantities is not essential.
Approx. Approx.
Grams relation relation
per
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