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`        What is the molality of C2H5oh in water solution which will freeze at -10degree Celsius? Kf for Water=1.86`
one year ago

Arun
23011 Points
```							You forgot to write Kf value of water. Here, you should add Kf of water = 1.86 We know, Depression in freezing pont = depression Constant × molalitye.g., ∆T = Kf × m Here, ∆T = 10°C [ we neglected sign ]Kf = 1.86 Now, 10 = 1.86 × m m = 10/1.86 = 5.37 Hence , molality = 5.37 m RegardsArun (askIITians forum expert)
```
one year ago
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