Question #1a1fa

1 Answer
Nathan L.
Aug 9, 2017

The formula for the percentage by volume of a substance #x# is given by

#ulbar(|stackrel(" ")(" "%"v/v"color(white)(l)x = ("volume of"color(white)(l)x)/("total volume") xx 100%" ")|)#

For example, if we have #20# #"mL"# of ethanol (#"C"_2"H"_5"OH"#) mixed with #150# #"mL"# water, then the volume percentage of ethanol is

#%"v/v C"_2"H"_5"OH" = (20color(white)(l)"mL C"_2"H"_5"OH")/(20color(white)(l)"mL C"_2"H"_5"OH" + 150color(white)(l)"H"_2"O") xx 100% = color(red)(11.8%#

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