Which of the following aqueous solutions produce the same osmotic pressure? (i)0.1 M $NaCl$ solution (ii) 0.1 M glucose solution (iii)0.6 g urea in 100 mL solution (iv)1.0 g of a non-electrolyte solute $(X)$ in 50 mL solution (molar mass of $X = 200$)

Question

Dr. Abubacker · Accepted Answer

(b)
(ii) 0.1 M glucose,
$\pi = CRT = 0.1RT$
(iii) 0.6 g urea in 100 mL solution
$\pi = \frac{n}{V}RT = \frac{w/m}{V}RT = \frac{0.6/60 	imes 1000}{100} 	imes RT = 0.1RT$
(iv)1.0 g of non electrolyte solute $(x)$ is 50 mL solution
$\pi = \frac{1.0/200}{50} 	imes 1000RT = 0.1RT$
Hence, option (ii), (iii), (iv) have some osmotic pressure, osmotic pressure of 0.1 M $NaCl$ is higher than (ii), (iii), (iv) because it dissociates to give maximum number

Q. Which of the following aqueous solutions produce the same osmotic pressure? (i)0.1 M $NaCl$ solution (ii) 0.1 M glucose solution (iii)0.6 g urea in 100 mL solution (iv)1.0 g of a non-electrolyte solute $(X)$ in 50 mL solution (molar mass of $X = 200$)

Explanation

Reviewed by Dr. Abubacker

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