Home
Class 12
CHEMISTRY
A solution containing 18g of non - volat...

A solution containing 18g of non - volatile non - electrolyte solute is dissolved in 200g of water freezes at 272.07K. Calculate the molecular mass of solute. Given `K_(f)=1.86kg//mol` and freezing point of water = 273K

Text Solution

Verified by Experts

`Delta T_(f) = K_(f) xx m or (K_(f) xx W_(2) xx 1000)/(M_(2) xx W_(1))`
`M_(2) = (1.86 xx 18 xx 1000)/((273 - 272.07) xx 200)`
= 180 g/mol.
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    OSWAAL PUBLICATION|Exercise TOPIC - 3 COLLIGATIVE PROPERTIES , DETERMINATION OF MOLAR MASS, ABNORMAL MOLAR MASS, VAN.T HOFF FACTOR (LONG ANSWER TYPE QUESTIONS - II)|18 Videos

  • SOLUTIONS

    OSWAAL PUBLICATION|Exercise TOPIC - 3 COLLIGATIVE PROPERTIES , DETERMINATION OF MOLAR MASS, ABNORMAL MOLAR MASS, VAN.T HOFF FACTOR (SHORT ANSWER TYPE QUESTIONS)|11 Videos

  • SOLID STATE

    OSWAAL PUBLICATION|Exercise TOPIC -2 (SHORT ANSWER TYPE QUESTIONS)|21 Videos

  • Solved Paper

    OSWAAL PUBLICATION|Exercise Exercise|60 Videos

Similar Questions

Explore conceptually related problems

a) 24 g of a non-volatile, non-electrolyte solute is added to 600 g of water. The boiling point of the resulting solution is 373.35K. Calculate the molar mass of the solute ("Given boiling point of pure water = 373 K and Kb for water=0.52 K kg mol"^(-1)) .

6 grams of a substance 'A' dissolved in 100 g of water freezes at - 0.93^(@)C . The molecular mass of 'A' is ( K_(f)=1.86 Km^(-1) ).

A solution containing 12.5 g of non-electrolyte solution in 175g of water gave a boiling point elevation of 0.7 k. calculate the molar mass of the solute if K_(b) for water is 0.52 K kg mol^(-1) .

A solution containg 12 g of a non-electrolyte substance in 52 g of water gave boiling point elevation of 0.40 K . Calculate the molar mass of the substance. (K_(b) for water = 0.52 K kg mol^(-1))

Answer any three of the following questions. a) 31 g of an unknown molecular material is dissolved in 500 g of water. The resulting solution freezes at 271.14 K. Calculate the molar mass of the material. Given : K_t for water =1.86"KK gmol1" T_(t)^(@) of water =273K .

1.0 g of non - electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0.4 K. Find the molar mass of the solute. [Given : Freezing point depression constant of benzene = 5.12 K. kg mol].

(a) 31 g of an unknown molecular material is dissolved in 500 g of water. The resulting solution freezes at 27.14 K. Calculate the molar mass of the material. [Given: K, for water 1.86 Kgmol^(-1) , T_(f)^(0) of water=273К]. (b) What is reverse osmosis? Mention its use.

The boiling point of benzene is 353.23 K when 1.80 g of a non-volatile, non-ionising solute was dissolved in 90 g of benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of solute. " " [Given K_(b) for benzene = 2.53 K kg mol^(-1) ]

OSWAAL PUBLICATION-SOLUTIONS-TOPIC - 3 COLLIGATIVE PROPERTIES , DETERMINATION OF MOLAR MASS, ABNORMAL MOLAR MASS, VAN.T HOFF FACTOR (LONG ANSWER TYPE QUESTIONS - I)
  1. The boiling point of benzene is 353.23 K when 1.80 g of a non-volatile...

    Text Solution

    |

  2. Acetone boils at 56.38^(@)C and a solution of 1.41 g of an organic com...

    Text Solution

    |

  3. Calculate the osmotic pressure of 0.05% urea solution in water at 20^(...

    Text Solution

    |

  4. A solution containing 18g of non - volatile non - electrolyte solute i...

    Text Solution

    |

  5. On dissolving 2.34g of non-electrolyte solute in 40g of benzene, the b...

    Text Solution

    |

  6. Determine the osmotic pressure of a solution prepa.red by diHolving 2....

    Text Solution

    |

  7. 1.0 g of non - electrolyte solute dissolved in 50 g of benzene lowered...

    Text Solution

    |

  8. A solution of glycerol (C(3) H(8) O(3)) in water was prepared by disso...

    Text Solution

    |

  9. Calculate the amount of KCl which must be added to 1 kg of water so th...

    Text Solution

    |

  10. At 25^(@)C , the saturated vapour pressure of water is 3.165 k Pa (23....

    Text Solution

    |

  11. Calculate the freezing point of an aqueous solution containing 10.50 g...

    Text Solution

    |

  12. What mass of ethylene glycol (molar mass = 62.0 g mol^(-1) ) must be a...

    Text Solution

    |

  13. 15 g of an unknown molecular substance was dissolved in 450 g of water...

    Text Solution

    |

  14. Vapour pressure of chloroform (CHCl(3)) and dichloromethane (CH(2) Cl(...

    Text Solution

    |

  15. At a given temperature and pressure nitrogen gas is more soluble in wa...

    Text Solution

    |

  16. Match the following if molecular masses of X, Y, Z are same

    Text Solution

    |

  17. At 10^(@) C, the average osmotic pressure of blood is 8.8 atm. Find th...

    Text Solution

    |