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Standard XII

Chemistry

Lewis Kossel Structure

Calculate the...

Question

Calculate the mass of ascorbic acid $(C_{6} H_{8} O_{6})$ to be dissolved in $75$ g of acetic acid to lower its melting point by ${1.5}^{0} C$ . (Kf for acetic acid is $3.9$ K kg ${m o l}^{- 1}$ ).

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Solution

$w_{2} = \frac{M_{2} w_{1} Δ T_{f}}{1000 K_{f}}$
$= \frac{176 \times 75 \times 1.5}{1000 \times 3.9}$
$= 5.08 g$

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Calculate the mass of ascorbic acid (C6H8O6) to be dissolved in 75 g of acetic acid to lower its melting point by 1.50C. (Kf for acetic acid is 3.9 K kg mol−1).

w2=M2w1ΔTf1000Kf=176×75×1.51000×3.9=5.08g

Calculate the mass of ascorbic acid $(C_{6} H_{8} O_{6})$ to be dissolved in $75$ g of acetic acid to lower its melting point by ${1.5}^{0} C$ . (Kf for acetic acid is $3.9$ K kg ${m o l}^{- 1}$ ).

$w_{2} = \frac{M_{2} w_{1} Δ T_{f}}{1000 K_{f}}$
$= \frac{176 \times 75 \times 1.5}{1000 \times 3.9}$
$= 5.08 g$