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CGP EDU Academic Team
Published on: August 14, 2026
5 g of Na 2 SO 4 are was dissolved in x g of H 2 O. The change in freezing point was found to be 3.82ºC. If Na 2 SO 4 is 81.5% ionised, the value of x (K f for water = 1.86ºC kg mol –1 ) is approximately :(molar mass of S = 32 g mol –1 and that of Na = 23 g mol –1 )
Text Solution
Verified by ExpertsThe correct answer is:
A
Δ T f = imk f
3.82= [1+(3–1).815]m ×1.86
= 
= 
x = 45 g
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