Write short notes on the following
(c) Hardy Schulze Rule

Explanation

### Step-by-Step Solution:

**Step 1: Definition of Hardy-Schulze Rule**
The Hardy-Schulze Rule is a principle in colloid chemistry that describes the relationship between the charge of coagulating ions and their ability to coagulate colloidal particles. It states that the greater the valency (or charge) of the coagulating ion, the more effective it is in coagulating colloidal particles.

**Step 2: Understanding Coagulation**
Coagulation is the process by which colloidal particles aggregate to form larger particles, leading to the separation of the colloid from the dispersion medium. This process is typically induced by the addition of ions that carry a charge opposite to that of the colloidal particles.

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