Question

Measuring Zeta potential is useful in determiningwhich property of colloidal solution ?

• A. Viscosity
• B. Solubility
• C. Stability of the colloidal particles
• D. Size of the colloidal particles

Answer 1

The Correct Option is C

To solve the question of which property of a colloidal solution is determined by measuring Zeta potential, let's explore the concept of Zeta potential and how it relates to colloids.

Understanding Zeta Potential:

Zeta potential is a scientific term for the electrokinetic potential in colloidal dispersions. It represents the potential difference between the dispersion medium and the stationary layer of fluid attached to the dispersed particle.

Role of Zeta Potential in Colloids:

Colloidal particles in a solution carry an electric charge. This charge is essential for the stability of the colloid, as it leads to repulsion forces between particles, preventing them from coming together and coagulating.

The Zeta potential, therefore, is a measure of the magnitude of the electrostatic or charge repulsion or attraction between particles. High Zeta potential (either positive or negative) will likely result in a stable colloid, as the particles tend to repel each other, preventing aggregation.

Analyzing the Options:

• Viscosity: This refers to the thickness or flow resistance of a liquid. Zeta potential does not directly measure viscosity.
• Solubility: Solubility is the ability of a substance to dissolve in a solvent and is not directly related to Zeta potential.
• Stability of the colloidal particles: High Zeta potential indicates good stability due to strong electrostatic repulsion between particles.
• Size of the colloidal particles: While particle size can influence Zeta potential, the measurement itself does not directly determine size.

Conclusion:

Based on the analysis, the correct answer is: Stability of the colloidal particles. Zeta potential is indeed a critical parameter in assessing whether a colloidal system will remain stable or aggregate over time.