Question

The greater the valence of the flocculating ion added, the greater is its power to cause precipitation of a colloid. This rule is:

• A. Hund’s rule
• B. Pauling rule
• C. Henry’s rule
• D. Hardy–Schulze rule

Hint:

Remember: Higher valency = greater flocculation power in colloids → Hardy–Schulze rule.

Answer 1

The Correct Option is D

The Hardy–Schulze rule states that the effectiveness of an ion in precipitating a colloid increases with its valence. For instance, Al\textsuperscript{3+} is more effective than Ba\textsuperscript{2+} or Na\textsuperscript{+} in precipitating negatively charged colloids.