April 19, 2024, 09:27:38 PM
Forum Rules: Read This Before Posting


Topic: Writing Equations For Freezing Point Lab  (Read 3038 times)

0 Members and 1 Guest are viewing this topic.

Offline student8607

  • Full Member
  • ****
  • Posts: 227
  • Mole Snacks: +2/-3
Writing Equations For Freezing Point Lab
« on: November 23, 2008, 01:47:56 PM »
This past week I did a chemistry lab that tested the freezing point of different solutes in water.

Sucrose: C12H22O11(s) + H2O(l) -->
Glucose: C6H12O6(s) + H2O(l) -->
Di-alcohol: C2H4(OH)2(aq) + H2O(l) -->
Tri-alcohol: C3H5(OH)3(aq)+ H2O(l) -->

I'm just not sure how to finish writing these "dissolution of the solid into water" equations?? Do I just group everything together like (C12H24O12) for sucrose?

I also wasn't sure if di-alcohol and tri-alcohol would classify as liquids or aqueous solutions?

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3652
  • Mole Snacks: +222/-42
  • Gender: Male
Re: Writing Equations For Freezing Point Lab
« Reply #1 on: November 23, 2008, 03:25:35 PM »
X(aq) means that it is already in aqueous (water) solution. X(l) means that it is a liquid. Can you think of some other liquids that you may have come across that are not water?

You should not just group everything together like C12H24O12 unless you are sure you are creating a new substance...

Offline student8607

  • Full Member
  • ****
  • Posts: 227
  • Mole Snacks: +2/-3
Re: Writing Equations For Freezing Point Lab
« Reply #2 on: November 23, 2008, 03:29:37 PM »
OK, well then the alcohols are definitely in aqueous form.

No, no new substance was formed. They were just mixed together???

Sponsored Links