Determination of Electrical Conductivity of Water

0
37

Aim

To determine the Electrical Conductivity of water.

Apparatus

Self-contained conductance instruments: (Conductivity meter).

Thermometer, capable of being read to the nearest 0.1°C and covering the range 10-50°C. Conductivity Cells:

Reagents

  • Conductivity water
  • Standard potassium chloride solution [0.01M KCl]

Theory

Conductivity is a measure of the capacity of water to pass an electrical current. Conductivity in water is affected by the presence of inorganic dissolved solids such as chloride, nitrate, sulfate, and phosphate anions (ions that carry a negative charge), or sodium, magnesium, calcium, iron, and aluminum cations (ions that carry a positive charge). A failing sewage system would raise the conductivity because of the presence of chloride, phosphate, and nitrate; an oil spill would lower conductivity. The basic unit of measurement of conductivity is the mho or siemens.

Procedure

  1. Calibrate the cell with solution
  2. Rinse the cell thoroughly with deionized distilled water and carefully wipe with a tissue paper
  3. Dip the cell into the sample solution, swirl the solution and wait upto 1 minute for a steady reading
  4. Note down the instrument reading and also temperature by a thermometer
Description of sample Temperature Conductivity
1
2
3

 

LEAVE A REPLY

Please enter your comment!
Please enter your name here