Question 37 • Chemistry
Osmotic pressure depends on the concentration of dissolved particles. FeCl₃ dissociates into 1 Fe³⁺ ion and 3 Cl⁻ ions, producing about 4 particles per formula unit, while glucose stays as 1 particle per molecule. With the same amount of solute and water, the FeCl₃ solution has about four times as many particles, so its osmotic pressure is four times as large, assuming complete dissociation.
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