What is kraft temperature?

Explanation

**Step-by-Step Solution:**

1. **Definition of Kraft Temperature:**
- Kraft temperature is defined as the minimum temperature above which the formation of micelles occurs when a surfactant, such as soap, is added to water.

2. **Understanding Micelle Formation:**
- Micelles are formed when surfactants are introduced into a solvent (like water). Surfactants have a dual nature; they possess a hydrophilic (water-attracting) head and a hydrophobic (water-repelling) tail.

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