Pure benzene freeze at `5.45^(@)"C"`. A solution containing 7.24g of `"C"_(2)"H"_(2)"Cl_(4)` in 115.3 g of benzene was observed to freeze at `3.55^(@)

Question

Pure benzene freeze at `5.45^(@)"C"`. A solution containing 7.24g of `"C"_(2)"H"_(2)"Cl_(4)` in 115.3 g of benzene was observed to freeze at `3.55^(@)

Pure benzene freeze at `5.45^(@)"C"`. A solution containing 7.24g of `"C"_(2)"H"_(2)"Cl_(4)` in 115.3 g of benzene was observed to freeze at `3.55^(@)"C".` What is the molal freezing point constant of benzene?

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - `5.058^(@)"C"`
`Delta"T"_("f")=("K"_("f")xx"w"_("B")xx1000)/("m"_("B")xx"w"_("A"))`
`1.90=("K"_("F")xx7.24xx1000)/(168xx115.3)`
`"K"_("f")=5.08^(@)"C"//"m"`

4 views Answered 2023-02-05 15:29