Define associated colloid with an example.

Explanation

**Step-by-Step Solution:**

1. **Definition of Associated Colloid:**
Associated colloids are a type of colloidal system that behaves like a strong electrolyte at low concentrations but exhibit colloidal properties at higher concentrations. This behavior is due to the aggregation of particles.

2. **Formation of Micelles:**
At higher concentrations, the particles in associated colloids aggregate to form structures known as micelles. Micelles are clusters of molecules that arrange themselves in a specific manner, usually with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward.

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