Home
Class 11
CHEMISTRY
A solution of 1.25g of a certain non-vol...

A solution of 1.25g of a certain non-volatile substance in 20g of water freezes at 271.94K. Calculate the molecular mass of the solute `(K_(f)=1.86" K kg mol"^(-1))`.

Text Solution

Verified by Experts

Freezing point of solution = 271.94 K
Freezing point of water = 273.0 K
`DeltaT=(273-271.94)=1.06K`
When we that, `m=(1000K_(f)xxw)/(WxxDeltaT)`
Given, `K_(f)=1.86"K kg mol"^(-1),w=1.25g,W=20g andDeltaT=1.06K`
`m=(1000xx1.86xx1.25)/(20xx1.06)=109.66`.
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS (GENERAL AND COLLIGATIVE PROPERTIES)

    OP TANDON|Exercise MISC Examples|26 Videos

  • SOLUTIONS (GENERAL AND COLLIGATIVE PROPERTIES)

    OP TANDON|Exercise Illustrations|47 Videos

  • PROBLEMS BASED UPON STRUCTURES AND REACTIONS OF ORGANIC COMPOUNDS

    OP TANDON|Exercise Some Solved Problems|21 Videos

  • STATES OF MATTER (GASES AND LIQUIDS)

    OP TANDON|Exercise Self Assess,ent|28 Videos

Similar Questions

Explore conceptually related problems

A solution containing 18 g of a non - electrolytic solute in 200g of H_(2)O freezes at 272.07 K . Find the molecular mass of the solute . ( K_(f) = 1.86 Km^(-1) ).

OP TANDON-SOLUTIONS (GENERAL AND COLLIGATIVE PROPERTIES)-Self Assessment
  1. A solution of 1.25g of a certain non-volatile substance in 20g of wate...

    Text Solution

    |

  2. The relative lowering of vapour pressure of an aqueous solution contai...

    Text Solution

    |

  3. If the elevation in boiling point of a solution of 10 g of solute (mol...

    Text Solution

    |

  4. Which one of the following aqueous solutions will exhibit highest boil...

    Text Solution

    |

  5. A solution containing 10 g per dm^(3) of urea (mol.wt. = 60 g mol^(-1)...

    Text Solution

    |

  6. The molarity of 5 molal aqueous solution of NaOH having density 1.2g/c...

    Text Solution

    |

  7. The value of osmotic pressure does no depend on :

    Text Solution

    |

  8. Henry's law constants for O(2) and N(2) are : k(O(2))=3.3xx10^(7)mk(...

    Text Solution

    |

  9. The molal lowering of vapor pressure for H(2)O at 100^(@)C is

    Text Solution

    |

  10. USP ethanol in aqueous solution is containing 95% ethanol by volume. A...

    Text Solution

    |

  11. A solution of 7.45 g KCl in 1000 mL shows osmotic pressure of 4.68 atm...

    Text Solution

    |

  12. The mass of glucose that would be dissolved in 50g of water in order t...

    Text Solution

    |

  13. Consider the following aqueous solutions and assume 100% ionisation in...

    Text Solution

    |

  14. K(2)HgI(4) is 50% ionised in aqueous solution. Which of the following ...

    Text Solution

    |

  15. Henry's law is invalid for gases like :

    Text Solution

    |

  16. The azetropic mixture of two liquids :

    Text Solution

    |

  17. Cryoscopic constant of a liquid depends on :

    Text Solution

    |

  18. Which of the following is/are influenced by the temperature ?

    Text Solution

    |

  19. Statement-1 : Solubility of ionic compounds in water depends on both t...

    Text Solution

    |

  20. Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason)....

    Text Solution

    |

  21. Statement-1 : The vapour pressure of 0.1 M Hg(2)Cl(2) is equal to 0.1 ...

    Text Solution

    |