How to find the volume fraction of a phase from weight fraction
Answers
Volume percent (v/v %) is defined as: volume percent = x 100%. Volume percent is handy when preparing solutions of liquids. Concentration of a solution can be stated in volume percentages. Be aware that volume of solution is in formula denominator, not volume of solvent.
Volume percent (vol/vol% or v/v%) should be used whenever a solution is prepared by mixing pure liquid solutions. In particular, it's useful where miscibility comes into play, as with volume and alcohol.
Acid and base aqueous reagents are usually described using weight percent (w/w%). An example is concentrated hydrochloric acid, which is 37% HCl w/w.
Dilute solutions are often described using weight/volume % (w/v%). An example is 1% sodium dodecyl sulfate. Although it's a good idea to always cite the units used in percentages, it seems common for people to omit them for w/v%. Also, note "weight" is really mass.