Ethanol Dissolving: Molecules Stay Intact?

  • Thread starter Thread starter dissolver
  • Start date Start date
  • Tags Tags
    Ethanol
Click For Summary

Discussion Overview

The discussion revolves around the behavior of ethanol when dissolved in water, specifically whether the individual ethanol molecules remain intact or undergo any form of ionization or dissociation. The scope includes theoretical and conceptual aspects of molecular interactions in solution.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that ethanol molecules remain intact in solution, similar to how sodium chloride does not break into ions.
  • Others argue that the interaction between water and ethanol is dynamic, involving transient intermolecular interactions and hydrogen bonding.
  • A later reply questions whether ethanol can actually become ionized, suggesting that hydrogen bonding plays a significant role in the solution.
  • One participant notes that hydrogen ions are transferred between water molecules, indicating a complex interaction even at neutral pH levels.

Areas of Agreement / Disagreement

Participants express differing views on whether ethanol remains intact or undergoes ionization in solution, indicating that the discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are limitations regarding the assumptions made about hydrogen bonding and ionization, as well as the varying significance of these interactions in different contexts, such as biochemistry versus undergraduate chemistry.

dissolver
Messages
16
Reaction score
0
When ethanol dissolves, the individual molecules stay intact right? It doesn't dissolve like a hydrohalic acid in which the polar bond actually breaks?
 
Chemistry news on Phys.org
Right, ethanol does not break into ions in solution as say...Sodium Chloride would.
When ethanol is put into solution, the molecule stays together.

Ethanol (l) --H2O--> Ethanol (aq)
 
Actually its more of a dynamic interaction between water and ethanol, same with water-water interactions. That is the intermolecular interactions are transient, the hydrogens are transferred throughout the solution; also note that ethanol has a significant pKa.
 
GCT said:
the hydrogens are transferred throughout the solution; also note that ethanol has a significant pKa.
Really? Obviously there would be some significant Hydrogen bonding going on, but it actually gets ionized?
 
Yeah, even with water, the hydrogen bonds are transient, however the lifetimes of these bonds relative to other weaker intermolecular bonds e.g. small van der wall interactions, are somewhat greater. The hydrogen ions are passed between the water molecules, even at a pH of 7. Biochemists take this perspective more seriously, although it is somewhat less important for undergraduate chemistry.
 

Similar threads

Replies
10
Views
6K
  • · Replies 7 ·
Replies
7
Views
3K
Replies
2
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 131 ·
5
Replies
131
Views
11K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
3
Views
2K
  • · Replies 7 ·
Replies
7
Views
10K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 6 ·
Replies
6
Views
1K