chem question?

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cyclohexae (C6H12) freezes at 6.55 degrees C. A solutionof 1.67 g of carbon disulfide (CS2) in 50.0g of cyclohexane freezes at -2.25 degrees C. What is the freezing point depression constant for cyclohexane??

2007-09-30 14:48:14 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

1 answers

A solutionof 1.67 g of carbon disulfide (CS2) in 50.0g of cyclohexane causes a freezing point depression of 6.55+2.25 = 8.80 degrees C. Equivalently, a solutionof 20x1.67 g = 33.4 g or 0.4389 mole of carbon disulfide (CS2) in 20x50.0g = 1000g of cyclohexane causes a freezing point depression of 8.80 degrees C. Or 1m of carbon disulfide (CS2) in cyclohexane causes a freezing point depression of 20.1 degrees C. Hence, the freezing point depression constant for cyclohexane is 20.1

2007-10-01 18:41:01 · answer #1 · answered by Hahaha 7 · 0⤊ 0⤋