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Question
20 g of a binary electrolyte (mol. mass = 100) are dissolved in 500 g of water. The freezing point of the solution is -0.744oC, Kf = 1.86 K molality-1. The degree of ionisation of the electrolyte is :-
Options
A.50%
B.75%
C.100%
D.Zero
Solution
ᐃTf = i(Kf × molality)
0.744 = i(1.86 ×
)
i = 1
0.744 = i(1.86 ×
)i = 1
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