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Cooling baths are solutions or mixtures that allow for cooling during a reaction or experiment. Many different solutions and mixtures are available to the amateur, often using ice or dry ice (Carbon dioxide) as a chilling source.

Types of Mixtures Edit

The below list is of basic, common, and easy to use mixtures[1].

  • Ice (0 °C) - Grind for best use.
  • Ice/NaCl at 1:1 (-20 °C) - Works best if ground. Saltwater and dry ice works well too. This is one of the cheapest and easy to make.
  • Acetonitrile/Dry Ice (-40 °C) - Add dry ice slowly.
  • Acetone/Dry Ice (-78 °C) - Mix slowly, may produce lots of CO2.

Other types:

  • Liquid nitrogen/Ethanol (-116°C) - Extremely cold, when it forms the surface will rapidly freeze, but the crust is easy to break. Once the liquid nitrogen will evaporate, the ethanol will have the consistency of a syrup.

References Edit

A more complete list of cooling baths can be obtained at the chem-wiki reference.

  1. http://chemwiki.ucdavis.edu/Reference/Lab_Techniques/Cooling_baths

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