Isotonic solutions have same

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🧠 Understanding "Iso-" and "-tonic"
The prefix "iso-" means same, and "-tonic" refers to tension or pressure (in this case, osmotic pressure). Isotonic solutions are those that can be placed next to each other across a semi-permeable membrane without any net "drama"—no water flows in either direction.

🗺️ The Colligative Fact
1. Osmotic Pressure (): For any solution, , where  is molarity and  is the van't Hoff factor.
2. The Condition: If two solutions are isotonic, it means .
3. Implications:

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