November 30, 2024, 07:47:12 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Molality  (Read 2116 times)

0 Members and 1 Guest are viewing this topic.

Offline Rutherford

  • Sr. Member
  • *****
  • Posts: 1868
  • Mole Snacks: +60/-29
  • Gender: Male
Molality
« on: April 27, 2012, 02:33:04 PM »
Calculate the number of moles of HCl if the molality of the HCl solution (m=1000g) is 1mol/kg.

First I calculated this way (using the mass of the solution):
1mol(HCl):(1000+36.5)g=x:1000g x=0.965mol, wrong answer.
Why?
Logged

Offline fledarmus

  • Chemist
  • Sr. Member
  • *
  • Posts: 1675
  • Mole Snacks: +203/-28
Re: Molality
« Reply #1 on: April 27, 2012, 03:57:26 PM »
I'm not sure I understand the question - are you supposed to calculate the number of moles in one kilogram of a one molal solution, or are you supposed to calculate the molarity of a one molal solution?
Logged

Offline Rutherford

  • Sr. Member
  • *****
  • Posts: 1868
  • Mole Snacks: +60/-29
  • Gender: Male
Re: Molality
« Reply #2 on: April 28, 2012, 06:47:20 AM »
The thing you wrote first.
Logged

Offline Rutherford

  • Sr. Member
  • *****
  • Posts: 1868
  • Mole Snacks: +60/-29
  • Gender: Male
Re: Molality
« Reply #3 on: April 28, 2012, 07:24:04 AM »
Never mind, I found out that it is the right answer.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links