When an electric current is applied to a solution of potassium chloride, the positive ions (K+) are attracted to the negative electrode (cathode), while the negative ions (Cl-) are attracted to the positive electrode (anode). As the ions move through the solution, they collide with each other and with the solvent molecules, but they continue to move in the direction of the electric field. This movement of ions is what constitutes an electric current.
The amount of electricity that a substance can conduct is measured by its electrical conductivity. The electrical conductivity of potassium chloride is quite high, which means that it is a good conductor of electricity. This is due to the fact that potassium chloride has a high concentration of free ions.
The electrical conductivity of a solution depends on a number of factors, including the concentration of ions, the temperature, and the presence of other substances. The higher the concentration of ions, the higher the electrical conductivity. The higher the temperature, the higher the electrical conductivity. The presence of other substances can either increase or decrease the electrical conductivity of a solution.
Potassium chloride is a good conductor of electricity and is often used in batteries, electronic devices, and other applications where electrical conductivity is desired.