Chloroform/metanol 1:1 turns cloudy when it is prepared

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Discussion Overview

The discussion revolves around the phenomenon of chloroform and methanol forming a cloudy mixture when combined in a 1:1 and 1:2 ratio. Participants explore potential reasons for this occurrence, including the purity of the solvents and the possibility of emulsification.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant notes that the mixture becomes milky, despite using freshly opened 99% pure solvents.
  • Another suggests that impurities in one of the solvents could be causing the cloudiness.
  • A different participant proposes that low solubility might lead to the formation of an emulsion.
  • There is a clarification regarding the participant's previous experiences with the mixture, indicating potential ambiguity in their past results.

Areas of Agreement / Disagreement

Participants express differing views on the cause of the cloudiness, with no consensus reached on the underlying issue.

Contextual Notes

Participants have not established the exact nature of the impurities or the conditions under which the cloudiness occurs, leaving several assumptions unaddressed.

Laura_SN
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Hi! I need to prepare Chloroform/methanol 1:1 and 1:2 and when I mix both solvents, it acquires a milky aspect. I have repeated the process several times in different flasks and bottles in the case it was due to wáter remaining or dirty stuff, but it always becomes cloudy when they are mixed. It has never happened to me previously. Could somebody help me! I am sorry but I am not good in Chemistry.. :(
 
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Perhaps one of the solvents contains impurities that are not soluble in the mixture?
 
Both are 99% pure solvents from bottles just opened in that moment. That´s the reason why I am so concerned about.
 
might be low solubility, and you're making an emulsion?
 
Last edited:
Hm, I read her "It has never happened to me previously." as "I did in the past and it worked", but perhaps that's not what Laura meant.
 

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