Question

The combination of two layers of opposite charges around the colloidal particle is called Helmholtz electrical double layer. The potential difference between the fixed layer and the diffused layer of opposite charge is called:

• A. electrode potential
• B. zeta potential
• C. adsorption potential
• D. diffused potential

Answer 1

The correct option is B zeta potential

• The combination of the two layers of opposite charges around the colloidal particle is called a Helmholtz electrical double layer.
• As the separation of charge is a seat of potential, the charges of opposite signs on the fixed and diffused parts of the double layer result in a difference in potential between these layers in the same manner as a potential difference is developed in a capacitor.
• This potential difference between the fixed layer and the diffused layer of opposite charges is called the electrokinetic potential or zeta potential.