badge image

Enroll For Free Now & Improve Your Performance.

User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 11


if 4 grams of sodium hydroxide is dissolved in 36 grams of water. the solution has the density of 1 gram per ml. find the mole fraction of sodium hydroxide along with molality

2 years ago

Answers : (1)

24738 Points
number of moles in 4 g NaOH= wt in gms/molwt=4/40=0.1
number of moles in 36 g H2O=wt in gms/mol wt=36/18=2
total no of moles=0.1+2.0=2.1
mole fraction o​f naoh=0.1/2.1=0.04
mole fraction of h2o=20/21=0.95
Density = Mass/ Volume 
Volume = Mass/Density

Volume (solution) = mass of solution/Density of solution
                              = 40 g / 1g ml
                              = 40 g 

Molarity = No . Moles of Solute x 1000 / Volume of the Solution (Into 1000 because Density is in g/ml)
               = .1 x 1000/40 
               = 10/4 
               = 2.5 M 
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 141 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details