Home
Class 12
CHEMISTRY
The addition of 3 gm of substance to 100...

The addition of 3 gm of substance to 100gm `C Cl_(4) (M=154 gm "mol^(-1))` raises the boiling point of `C Cl_(4)` by `0.6^(@)C. K_(b)(C Cl_(4))` is `5.03d kg "mol"^(-1)K, K_(f)(C Cl_(4))` is ` 31.8 kg "mol"^(-1)K` and dencity of solution is 1.64 gm/ml .
Calculate the depression in freezing point

A

`3.79^(@)C`

B

`0.018^(@)C`

C

`4.65^(@)C`

D

`251.5^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

The addition of 3 gm of substance to 100gm C Cl_(4) (M=154 gm "mol^(-1)) raises the boiling point of C Cl_(4) by 0.6^(@)C. K_(b)(C Cl_(4)) is 5.03d kg "mol"^(-1)K, K_(f)(C Cl_(4)) is 31.8 kg "mol"^(-1)K and dencity of solution is 1.64 gm/ml . The molar mass of the substance is :

The addition of 3 gm of substance to 100gm C Cl_(4) (M=154 gm "mol^(-1)) raises the boiling point of C Cl_(4) by 0.6^(@)C. K_(b)(C Cl_(4)) is 5.03d kg "mol"^(-1)K, K_(f)(C Cl_(4)) is 31.8 kg "mol"^(-1)K and dencity of solution is 1.64 gm/ml . The Osmotic pressure at 298K is :

A solution of urea has boiling point 100.15^@C, K_f and K_b for water are 1.87 and 0.52 K kg "mol"^(-1) . Calculate (a) molality and (b) freezing point of the solution.

The enthalpy change on freezing of 1 mol of water at 5^(@)C to ice at -5^(@) C is (Given Delta_("fus") H = 6 kJ mol^(-1) at 0^(@) C , C_(p) (H_(2) O , l) = 75.3 J mol^(-1) K^(-1) , C_(p) (H_(2) O , s) = 36.8 J mol^(-1) K^(-1))

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

1.0 molal aqueous solution of an electrolyte X_(3)Y_(2) is 25% ionized. The Boiling point of the solution is (K_(b) of H_(2)O=0.52K kg mol^(-1))

An aqueous solution freezes at - 0.372^@C . If K_f and K_b for water are 1.86K kg "mol"^(-1) and 0.53 K kg "mol"^(-1) respectively, the elevation in boiling point of same solution in K is: