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

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SUMMARY

The discussion centers on the issue of preparing a 1:1 and 1:2 mixture of chloroform and methanol, which consistently turns cloudy upon mixing. The user reports using 99% pure solvents from newly opened bottles, indicating that impurities are unlikely. The cloudiness may result from low solubility or the formation of an emulsion, which has not been encountered by the user in previous attempts. This suggests a need for further investigation into the solvent properties and potential interactions.

PREREQUISITES
  • Understanding of solvent properties, specifically chloroform and methanol.
  • Knowledge of emulsion formation and solubility principles.
  • Familiarity with laboratory practices for preparing chemical mixtures.
  • Basic chemistry concepts related to purity and impurities in solvents.
NEXT STEPS
  • Research the solubility characteristics of chloroform and methanol mixtures.
  • Investigate the effects of impurities on solvent behavior and mixture clarity.
  • Learn about emulsion stability and methods to prevent cloudiness in mixtures.
  • Explore alternative purification techniques for solvents to ensure higher purity levels.
USEFUL FOR

Chemists, laboratory technicians, and students studying solvent interactions and mixture preparation will benefit from this discussion.

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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