CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Depression in Freezing Point

Elevation in ...

Question

Elevation in boiling point for $1.5$ molal solution of glucose in water is $4 K$ . The depression in freezing point for $4.5$ molal solution of glucose in water is $4 K$ . The ratio of molal elevation constant to molal depression constant $(K_{b} / K_{f})$ is ___.

Open in App

Solution

$Δ T_{b} = i \times K_{b} \times m$

$Δ T_{f} = i \times K_{f} \times m$ $(i = 1)$

$\frac{4 = 1 \times K_{b} \times 1.5}{4 = 1 \times K_{f} \times 4.5}$

$\frac{K_{b}}{K_{f}} = 3$

Suggest Corrections

thumbs-up

14

Similar questions

Q. Elevation in the boiling point for 1 molal solution of glucose is 2K. The depression in the freezing point of 2 molal solutions of glucose in the same solvent is 2K. The relation between

K_{b}

K_{f}

Q. The elevation in boiling point for 1 molal solution of non-volatile solute

A

3 K

. The depression in freezing point for 2 molal solution of A in the same solvent is

6 K

K_{b}

K_{f}

\frac{K_{b}}{K_{f}}

1 : X

X

is [nearest integer]

Q. A solution of urea in water has a boiling point of

100.18^{\circ} C .

Calculate the freezing point of the same solution. Molal depression and elevation constants for water

K_{f}

K_{b}

1.86^{\circ} {C kg mol}^{- 1}

0.512^{\circ} {C kg mol}^{- 1}

Q. Molal depression constant for water is

1.86 K k g . {m o l}^{- 1}

. The freezing point of a

0.05

molal solution of a non-electrolyte in water is:

Q. Calculate the molal elevation constant,

k_{b}

for water and the boiling point of 0.1 molal urea solution. Latent heat of vaporisation of water is 9.72 kcal mol

^{- 1}

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Depression in Freezing Point

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Depression in Freezing Point

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon