Home
Class 12
CHEMISTRY
The relative lowering of the vapour pres...

The relative lowering of the vapour pressure of an aqueous solution containing a non-volatile solute is `0.0125`. The molality of the solution is
a. `0.80` , b.`0.50` , c.`0.70` , d.`0.40`

Text Solution

Verified by Experts

`(P_(A)^(@)-P_("solution"))/(P_(A)^(@))=0.0125=x_(B)=(n_(B))/(n_(A)+n_(B)), :. x_(A)=0.9875=(n_(A))/(n_(A)+n_(B))`
`(n_(B))/(n_(A))=1/79, m=(n_(B))/(w.t. "of solvent"(kg))=(n_(B))/((n_(A)xx"molar mass of solvent")xx10^(-3))`
`=1/(79xx18xx10^(-3))~~0.70`
Promotional Banner

Topper's Solved these Questions

  • THEORY OF SOLUTIONS

    VMC MODULES ENGLISH|Exercise JEE Main (Archive)|57 Videos

  • THEORY OF SOLUTIONS

    VMC MODULES ENGLISH|Exercise JEE Advanced (Archive)|31 Videos

  • THEORY OF SOLUTIONS

    VMC MODULES ENGLISH|Exercise LEVEL 1|75 Videos

  • THE SOLID STATE

    VMC MODULES ENGLISH|Exercise EXERCISE-J|10 Videos

  • THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise JEE ADVANCED (ARCHIVE)|31 Videos

Similar Questions

Explore conceptually related problems

The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute, is 0.0125. The molality of the solution is

The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute, is 0.0125. The molality of the solution is

Calculate relative lowering of vapour pressure of 0.161 molal aqueous solution

Lowering of vapour pressure of an aqueous solution of a non-volatile non-electrolyte 1 m aqueous solution at 100^(@)C is,

Relative loweringof vapour pressure of a dilute solution is 0.2 . What is the mole fraction of non-volatile solute ?

Mole fraction of a solute in an aqueous solution is 0.2. The molality of the solution will be

The relative lowering of vapour pressure is equal to the mole fraction of the non-volatile solute. This statement was given by

Calculate the vapour pressure of an aqueous solution of 1.0 molal glucose solution at 100^(@)C .

The relative lowering of vapour pressure of an aqueous solution of a non-volatile solute of molecular weight 60 (which neither dissociates nor associates in the solution) is 0.018. If K_(f) of water is 1.86^(@)Cm^(-1) the depression in freezing point will be :

Mole fraction of urea in its aqueous solution is 0.2, them molality of the solution will be.

VMC MODULES ENGLISH-THEORY OF SOLUTIONS-LEVEL 2
  1. Two equimolar solutions have osmotic pressures in the ratio of 2 : 1 a...

    Text Solution

    |

  2. Human blood gives rise to an osmotic pressure of approximately 7.65 at...

    Text Solution

    |

  3. Osmotic pressure of insulin solution at 298 K is found to be 0.0072atm...

    Text Solution

    |

  4. Out of the compounds below, the vapour pressure of (B) at a particular...

    Text Solution

    |

  5. How much urea must be dissolved in 10^(-2)m^(3) water to yield a press...

    Text Solution

    |

  6. Acetic acid exists in benzene solution in the dimeric form. In an actu...

    Text Solution

    |

  7. Calculate the mass of a non-volatile solute (molar mass 40 g mol^(-1))...

    Text Solution

    |

  8. 1000gm of sucrose solution in water is cooled to -0.5^(@)C. How much ...

    Text Solution

    |

  9. The depression in freezing point of 0.01 m aqueous CH(3)CooH solution ...

    Text Solution

    |

  10. When 20 g of naphthoic acid (C(11)H(8)O(2)) is dissolved in 50 g of be...

    Text Solution

    |

  11. 75.2 g of phenol is dissolved in a solvent of Kf=14. If the depression...

    Text Solution

    |

  12. A storage battery contains a solution of H(2)SO(4) 38% by weight. At t...

    Text Solution

    |

  13. Calculate the apparent degree of ionisation of an electrolyte MX(2) i...

    Text Solution

    |

  14. The vapour pressure of a solution of a non-volatile electrolyte B in a...

    Text Solution

    |

  15. The relative lowering of the vapour pressure of an aqueous solution co...

    Text Solution

    |

  16. A 5 per cent aqueous solution by mass of a non-volatile solute boils a...

    Text Solution

    |

  17. One gram of serum albumin dissolved in 1000cm^(3) of water gives a sol...

    Text Solution

    |

  18. Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The...

    Text Solution

    |

  19. The freezing point of 0.08 molal NaHSO(4) is -0.345^(@)C. Calculate th...

    Text Solution

    |

  20. Freezing point of 0.2 M KCN solution is -0.7^(@)C. On adding 0.1 mole ...

    Text Solution

    |