Multiple choice

Two solutions are said to be isotonic when they

  1. have the same osmotic pressure

  2. are of equal concentration

  3. contain the same solute dissolved in them

  4. have the same vapour pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Isotonic solutions are defined as having the same osmotic pressure across a semipermeable membrane. While they often have similar concentrations, the defining characteristic is the osmotic pressure.

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