The freezing point of a solution containing `50 cm^(3)` of ethylene glycol in `50 g` of water is found to be `-34^(@)C`. Assuming ideal behaviour, Calculate the density of ethylene glycol `(K_(f)` for water = `1.86 K kg mol^(-1)`).

Options

A. `1.13g//cm_(3)`
B. `2.00g//cm_(3)`
C. `1.8g//cm_(3)`
D. `2.25g//cm_(3)`

Answer

A

Explanation

`DeltaT=K_(f)xx(wxx1000)/(mxxW)`
`34=1.86xx(wxx1000)/(62xx50)`
`w=56.66g`
`V=(w)/(d)`
`50=(56.66)/(d)`
`d=1.13g//cm^(3)`