November 25, 2024, 06:50:55 AM
Forum Rules: Read This Before Posting


Topic: Help with HW question  (Read 2899 times)

0 Members and 1 Guest are viewing this topic.

Offline mccrisp

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-0
Help with HW question
« on: July 17, 2010, 12:07:02 PM »
Could someone show me how to do a problem like this?

What volume of ethylene glycol (HOCH2 CH2 OH) must be added to 125mL of water to provide a solution with a boiling point of 101.0 degrees C?

Offline Jorriss

  • Chemist
  • Full Member
  • *
  • Posts: 523
  • Mole Snacks: +41/-14
Re: Help with HW question
« Reply #1 on: July 17, 2010, 02:02:20 PM »
Since you didn't show anything, I'll give you something very general. Colligative properties.

Offline opti384

  • Full Member
  • ****
  • Posts: 434
  • Mole Snacks: +33/-25
  • Gender: Male
    • In the Search for the Laws of Nature
Re: Help with HW question
« Reply #2 on: July 18, 2010, 10:21:30 AM »
A further hint will be the increased boiling point is proportional to the molality of the solute.

Offline mccrisp

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-0
Re: Help with HW question
« Reply #3 on: July 18, 2010, 05:58:21 PM »
I was looking more how to solve the math problem. Like which formulas to use and how would I go about setting the problem up. Can anyone help me with that?

Offline Schrödinger

  • Chemist
  • Sr. Member
  • *
  • Posts: 1162
  • Mole Snacks: +138/-98
  • Gender: Male
Re: Help with HW question
« Reply #4 on: July 19, 2010, 01:13:37 AM »
Google : Boiling-point elevation
"Destiny is not a matter of chance; but a matter of choice. It is not a thing to be waited for; it is a thing to be achieved."
- William Jennings Bryan

Sponsored Links