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:

The Hardy—Schulze rule is an important principle in colloid chemistry, stating that the flocculating power of an ion increases with its valence. This rule helps in understanding the stability and precipitation of colloidal solutions.

Answer 1

The Correct Option is D

Step 1: Understand the Rule
The statement concerns the connection between the valence of a flocculating ion and its effectiveness in precipitating a colloid. This is a standard principle in colloid chemistry.
Step 2: Analyze the Options
Hund's rule: Pertains to electron orbital filling in atoms, not colloid chemistry.
Pauling rule: Pertains to predicting crystal structures, not colloid chemistry.
Henry's rule: Pertains to gas solubility in liquids, not colloid chemistry.
Hardy—Schulze rule: States that a higher valence of a flocculating ion increases its precipitation power for a colloid.
Step 3: Match with Options
The Hardy—Schulze rule aligns with the description, corresponding to option (D).Final Answer: The correct rule is (D) Hardy—Schulze rule.