Electrolytes: Pure Substances and Aqueous Solutions with which proportion the conductivity, the greater the number of ions this experiment, the conductivity of pure substances and their aqueous solutions will be using the Labworks Interface. Conductivity (expressed in μ. microsiemens) reflects the ease a substance will conduct an electrical current. In this experiment, conductivity is directly al to the number of ions capable of supporting current flow through a substance. The greater Conductivity will be measured using equipment manufactured by Microlab. Follow the instructions provided to set up and calibrate the system. Instructions for MicroLab Conductivity Experiments Opening program 1. 2. Double click on the Microlab icon on the desktop. In "Choose an Experiment Type," double click on the Microlab tab. Setting up and Calibrating Conductivity Probe Click on the Add Sensor button at the bottom of the Data Sources/Variables dialog box. In the Choose drop down menu, select Conductivity. Click on the red square [A] to select probe connection port, then click Next. Click New Calibration button, click on Add Calibration Point. Insert clean, dry probe in a beaker marked air, adjust sensitivity slider control to least sensitive. Type "O" into the Actual Value box then click OK to save this first calibration point. Click on Add Calibration Point a second time. Insert conductivity probe into 0.1000% KC solution. Agitate probe in solution to dislodge any air bubbles are in the probe window. Adjust sensitivity slider control to least sensitive setting. When reading is stable, type 2000 into Actual Value box then click OK to save this second calibration point. On the curve fit choices box, select First Order (Linear). 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. NOTE: A straight line, sloping up left to right, should appear at this point connecting the zero calibration point on the lower left with the upper right high calibration point. 14. 15. 16. 17. Click on Accept and Save This Calibration. On the next screen μs as the units for conductivity will appear, click OK to accept. File dialog box will appear, type in Calibration followed by your section number Click on Finish to exit instrument set up and calibration. Page 1 of 8 Rev E- 8-2017