Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • If the density of some lake water is 1.25g mL^–1 and contains 92 g of Na^+ ions per kg of water, calculate the molality of Na ^+ ions in the lake.

2.26   If the density of some lake water is 1.25g\; mL^{-1} and contains 92\; g of Na^{+}\; ions per kg of water, calculate the molality of Na^{+}\; ions in the lake.

Answers (1)

best_answer

We know that, Molality :

                                          Molality = \frac{Moles\ of\ solute}{Mass\ of\ solvent\ in\ Kg}

So, for moles of solute we have :   

                           Moles\ of\ Na^+ = \frac{92}{23} = 4

Thus,  molality :  

                                      = \frac{4}{1} = 4

Molality of Na+ ions is 4m.

Posted by

Devendra Khairwa

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

Board Exam Date Sheet 2025: CBSE, UPMSP, MPBSE, Class 10, 12 board exam dates out; BSEB, CGBSE schedules soon
anam-khan

CBSE Date Sheet 2025 (Out) Live: Class 10, 12 board exam time table at cbse.gov.in; syllabus, sample papers
anam-khan

CBSE Class 12 board exam date sheet 2025 out; exams from February 15 to April 4

Latest Question