Isotonic Solutions, Which one of the following pairs of solutions can we expect to be

Isotonic Solutions

Which one of the following pairs of solutions can we expect to be isotonic at the same temperature:
(i) 0.1M Urea and 0.1M Nacl (ii) 0.1M Urea and 0.2M Mgcl₂ (iii) 0.1M Nacl and 0.1M Na₂SO₄ (iv) 0.1M Ca(NO₃)₂ and 0.1M Na₂SO₄
Answer: (d) Osmotic pressure is a colligative properties equimolar solution of Ca(NO₃)₂ and Na₂SO₄ will produce same number of solute particles.

Ca(NO₃) = Ca²⁺ + 2NO₃^-
Na₂(SO₄) = 2 Na⁺ + SO₄^2-

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