The freezing point depression constant for water is -“ 1.86ºCm-“1. If 5.00 g Na2 SO4 is dissolved in 45.0 g H2O - the freezing point is changed by -“ 3.82ºC. Calculate the van-™t Hoff factor for Na2 SO4. [2011]

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The freezing point depression constant for water is -“ 1.86ºCm-“1. If 5.00 g Na2 SO4 is dissolved in 45.0 g H2O - the freezing point is changed by -“ 3.82ºC. Calculate the van-™t Hoff factor for Na2 SO4. [2011]