Question

What mass of Na2SO4 must be dissolved in 100.0 grams of water to lower the freezing point by 2.50 C? The freezing point depression constant, Kfp, of water is -1.86 C/m. Assume the van't Hoff factor for Na2SO4 is 2.85.
A.3.77 g
B.6.36 g
C.6.70 g
D.11.3 g
E.19.1 g

Answer

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