Home
Class 12
CHEMISTRY
Calculate the mass of ascorbic acid ( Vi...

Calculate the mass of ascorbic acid `(` Vitamin `C,C_(6)H_(8)O_(6))` to be dissolved in `75g` of acetic acid to lower its melting point by `1.5^(@)C. K_(f)=3.9 K kg mol ^(-1)`

Text Solution

Verified by Experts

Given `DeltaT_(f)=1.5^(@)`
Mass of `CH_(3)COOH,w_(1)=75g`
`M_(1)=60" g "mol^(-1)`
`M_(2)(C_(6)H_(8)O_(6))=176" g "mol^(-1)`
`K_(f)=3.9` K kg `mol^(-1)`
To find: `w_(2)=?`
Solution: Applyig `M_(2)=(1000K_(f)w_(2))/(w_(1)DeltaT_(f))`
or, `w_(2)=(M_(2)xxw_(1)xxDeltaT_(f))/(1000xxK_(f))`
`w_(2)=(176xx75xx1.5)/(1000xx3.9)=5.077g`
Promotional Banner

Similar Questions

Explore conceptually related problems

Calculate the mass of ascorbic acid ( Vitamin C,C_(6)H_(8)O_(6)) to be dissolved in 75g of acetic acid to lower its melting poit by 1.5^(@)C. K_(f)=3.9 K kg mol ^(-1)

Calculating the mass of ascorbic acid (C_(6)H_(8)O_(6)) to be dissolved in 74 g of acetic acid to lower its melting point by 1.5^(circ)C. K_(f) for CH_(3)COOH is 3.9 K kg nol^(-1) .

The mass of ascorbic acid (C_(6)H_(8)O_(6)) to be dissolved in 100g of acetic acid to lower its freezing point by 1.5^(@)C in g is : ( K_(f) for acetic acid is "4.0 K kg mol"^(-1) )

Calculatate the mass of compound (molar mass = 256 g mol^(-1) be the dissolved in 75 g of benzene to lower its freezing point by 0 .48 k(k_(f) = 5. 12 k kg mol ^(-1) .

What mass of ethlene ethyelne glycol ("molar mass"=62 g mol^(-1)) must be dissolved in 5.5kg of water to lower the freezing point of from 0^(@)C to-10^(@)C ? (K_(f)) for water=1.86 K kg mol^(-1) ).