Measurement of electrical conductance to determine the dissociation constant of acetic acid
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- Make yourself familiar with the instruments by hovering over them, then click on the Start button to start the experiment.
- Turn on the main switch.
- Press the power button on the conductometer.
- Rotate the FUNCTION knob and set it to CELL-CONST mode.
- Rotate the CELL-CONST knob to set the cell constant.
- Rotate the FUNCTION knob and set it back to MHOS mode.
- Clean the conductivity cell with distilled water.
- Note down every value shown on the conductivity meter screen.
- Measure NaCl solution conductivity at different concentrations: 0.05 N, 0.025 N, 0.0125 N, 0.0062 N, 0.0031 N, 0.0016 N.
- Dip the conductivity cell into each sodium chloride solution of different concentrations one by one.
- Leave the conductivity cell dipped in the solution for some time to establish equilibrium for accurate measurement.
- Note down every reading shown on the conductometer screen.
- Measure HCl solution conductivity at different concentrations: 0.05 N, 0.025 N, 0.0125 N, 0.0062 N, 0.0031 N, 0.0016 N.
- Note down the readings carefully.
- Clean the conductivity cell with distilled water.
- Write down readings for each hydrochloric acid solution.
- Leave the conductivity cell dipped in the solution for some time to establish equilibrium for accurate measurement.
- Note down every reading shown on the conductometer screen.
- Measure conductivity of CH3COONa solution at different concentrations: 0.05 N, 0.025 N, 0.0125 N, 0.0062 N, 0.0031 N, 0.0016 N.
- Note down the readings carefully.
- Clean the conductivity cell with distilled water.
- Write down readings for sodium acetate solution.
- Leave the conductivity cell dipped in the solution for some time to establish equilibrium for accurate measurement.
- Note down every reading shown on the conductometer screen.
- Press the Observations button to see all readings, values, and calculations.