What Mass of Na₂SO₄ Must Be Dissolved in 100 $\circ$ C? the Freezing Point Depression Constant,K_fp,of Water Is -1

question 76

Multiple Choice

What mass of Na₂SO₄ must be dissolved in 100.0 grams of water to lower the freezing point by 2.50 ^$\circ$ C? The freezing point depression constant,K_fp,of water is -1.86 ^$\circ$ 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

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