When water is mixed with rubbing alcohol, the two liquids completely dissolve. Are the two liquids miscible, or are they immiscible?

1 Answer
Apr 24, 2016

Answer:

I always read #"miscible"# as #"mixable"#; it means that they are soluble in each other

Explanation:

The longer the alkyl chain of the alcohol, the less soluble the alcohol in water. Methanol and ethanol are infinitely miscible in water, Even though #Pr^(i)OH# is a #2""^@# alcohol, the alkyl chain is sufficiently short to allow significant water solubility.

In the laboratory, bulk isopropyl alcohol or #"IPA"# as it is called, is used as a solvent for potassium hydroxide to make a very powerful cleaning agent for glassware. #KOH# goes up slowly, but the bath will dissolve silicone grease.