Question

Question #1a1fa

Answer 1

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%`