Pasco CI-6729 (1X) CONDUCTIVITY SENSOR Manuel d'utilisateur

© 1997 PASCO scientific $7.50Instruction Manual andExperiment Guide for thePASCO scientificModel CI-6729 (1X) andModel CI-6739A (10X)012-06485B12/97CO

6Conductivity Sensor 012–06485B-+After a fairly short period of time most of the ions in solution will moveto the electrodes and the current flow thro

7012–06485B Conductivity SensorCONDUCTIVITYSENSORCI-67292K20K200RANGESELECTCONDUCTIVITYSENSORCI-67292K20K200RANGESELECTCONDUCTIVITYSENSORCI-6729CI-673

8Conductivity Sensor 012–06485B➤ Always calibrate theelectrode before measuringabsolute (rather than relative)concentrations.Single-Point Calibratio

9012–06485B Conductivity SensorExperiment 1: Introduction to the Operation of theConductivity SensorPurposeThe purpose of this experiment is to learn

10Conductivity Sensor 012–06485BSome vendors of drinking and mineral water list the total dissolved solids (TDS) in parts per million. Using the rule

11012–06485B Conductivity SensorExperiment 2: Concentration Dependence of Conductivity inAqueous SolutionsPurposeThe purpose of this experiment is to

12Conductivity Sensor 012–06485B15.0 grams of citric acid have been added. In the Keyboard Input box continue to type thetotal mass of citric acid add

13012–06485B Conductivity SensorExperiment 3: Temperature Dependence of Conductivity inDilute Aqueous SolutionsPurposeThe purpose of this experiment

14Conductivity Sensor 012–06485B4. Set up the Conductivity Sensor according to the procedure detailed in pages 6–7 of themanual. Select the 20k scale

15012–06485B Conductivity SensorQuestions1. Describe the effect of temperature change on the conductivity of the solutions.2. Compare the experimental

Conductivity Sensor 012–06485BAlways use eye protection,gloves, and an apron whenworking with chemicals.Caution: Follow all localregulations for the

16Conductivity Sensor 012–06485B

17012–06485B Conductivity SensorExperiment 4: Acid-Base Titration with the Conductivity SensoPurposeThe purpose of this experiment is to explore the

18Conductivity Sensor 012–06485B8. Rinse the 50 ml buret with a few ml of the 0.5 M sodiumhydroxide (NaOH) solution. Dispose of the rinse solution asd

19012–06485B Conductivity SensorTeacher’s NotesThese experiments are designed to familiarize the student with the operation of the ConductivitySensor.

20Conductivity Sensor 012–06485Bthe solution will increase. Students can use a magnetic stirrer, ifavailable. An example of the data is shown in Figur

21012–06485B Conductivity Sensor1. The conductivity increases linearly with temperature overthe observed temperature region.2. The slopes are approxim

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23012–06485B Conductivity SensorAppendix Table 1—Conductivity of Various Water Samples at 25 °CResistivity in ohm-cm 100M 10M 1M .1M 10K 1K 100 10

24Conductivity Sensor 012–06485B Table 2—Table of Conductivity vs. Concentration for Common SolutionsPoint ofMaximun—Point(s) of 31% 92.5%830,00013

25012–06485B Conductivity SensorTable 3—Table of Conductivity vs. Concentration for Common SolutionsWt. % ppm H3PO4 NH4OH NH3 CaCl2 KNO3 CuSO4

012–06485B Conductivity SensorTable of ContentsSection PageCopyright, Warranty, and Equipment Return ...

26Conductivity Sensor 012–06485BReferenceSolutionApproximationNormality ofSolutionABCD10.10.010.00174.2480 g of KCI weighed in air per 1 L of solution

27012–06485B Conductivity SensorSources of Conductivity Data1. International Critical Tables, Vol. VI, 230–258; McGraw Hill,1929.2. Handbook of Ch

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29012–06485B Conductivity SensorTechnical SupportFeedbackIf you have any comments about the product or manual,please let us know. If you have any sugg

Conductivity Sensor 012–06485BiiCopyright NoticeThe PASCO scientific Conductivity Sensor manual(012-06485A) is copyrighted and all rights reserved.How

1012–06485B Conductivity SensorCONDUCTIVITYSENSORCI-6729CI-6739A2K20K200RANGESELECT699-06620CONDUCTIVITY699-06621CONDUCTIVITY10XIntroductionThe PASCO

2Conductivity Sensor 012–06485BMaintenanceCleaningTo ensure accurate and reproducible results, the electrode cell must be clean.A dirty cell will cont

3012–06485B Conductivity SensorTheory—Principles of Operationof the Conductivity SensorWhat is Conductivity?Conductivity (or specifically, electrolyti

4Conductivity Sensor 012–06485BHowever when dealing with a chemical solution ranging from extremelydilute to very concentrated chemical, use of conduc

5012–06485B Conductivity Sensorelectrodes can be placed closer together, reducing the length between themand producing cell constants of 0.1 or 0.01.