Home
Class 12
CHEMISTRY
Calculate the mass of urea (NH(2)CONH(2)...

Calculate the mass of urea `(NH_(2)CONH_(2))` required in making `2.5 kg `of `0.25 `molal aqueous solution.

Text Solution

Verified by Experts

0.25 molal aqueous solution of urea means that
Moles of urea = 0.25 mole.`" "` Mass of solvent (water) = 1 kg = 1000 g
`"Molar mass of urea "(NH_(2)CONH_(2))=14+2+12+16+14+2="60 g mol"^(-1)`
`therefore" 0.25 mole of urea "="0.25 mole "xx"60 g mol"^(-1)=15g`
Thus, 1.015 kg of solution contain urea = 15 g
`therefore" 2.5 kg of solution will require urea "=(15 g)/(1.015 kg)xx2.5kg=37g.`
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    PRADEEP|Exercise NCERT EXERCISES|50 Videos

  • SOLUTIONS

    PRADEEP|Exercise NCERT (EXEMPLAR PROBLEMS WITH ANSWERS, HINTS AND SOLUTIONS) (MULTIPLE CHOICE QUESTIONS - I)|26 Videos

  • SOLUTIONS

    PRADEEP|Exercise CONCEPTUAL QUESTIONS|41 Videos

  • REDOX REACTIONS

    PRADEEP|Exercise Assertion reason type question|16 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    PRADEEP|Exercise Competition (FOCUS) JEE (Main and Advanced)/Medical Entrance SPECIAL (VIII. Assertion-Reason Type Questions)(Type II)|13 Videos

Similar Questions

Explore conceptually related problems

Mole fraction of a solute in 2.5 molal aqueous solution is

Calculate the mass of anhydrous Na_2CO_3 required to prepare 250 ml 0.25 M solution .

The Van't Hoff factor i for a 0.2 molal aqueous solution of urea is