Question

A solution containing 0.8716 mol L-1 of sucrose at 298 K is iso-osmotic with a solution of sodium chloride containing 0.5 mol L-1 of NaCl. The degree of dissociation of NaCl is:

Answer 1

Answer:

NaCl(1−x)  dissociates into Na+(x) and Cl−(x)

Total concentration in solution =c(1+x)=0.1M(1+x)

Osmotic pressure of NaCl solution =0.1M(1+x)RT

Osmotic pressure of urea solution =0.1L(1/60)molRT

since solutions are isotonic, therefore, 1+x=1.667

(b) Degree of dissociation =x=0.667

Explanation:

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