Question
Asked Feb 26, 2020
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The freezing points of 0.0905 m ammonium chloride and 0.0388 m ammonium sulfate in water were found to be –0.322°C and –0.173°C, respectively. What are the values of the van't Hoff factors for these salts?

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Expert Answer

Step 1

Kf for water = 1.86°C/m 

Normal freezing point of water, T1 = 0.00°C

Step 2

Molality of ammonium chloride solution, m1 = 0.0905 m

Freezing point of ammonium chloride solution = -0.322°C

van't Hoff factors for ammonium chloride is given below,

Chemistry homework question answer, step 2, image 1

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