What is the concentration by volume if a solution is prepared by adding #25mL# of #"ethyl alcohol"# to #125mL# of water?

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Answer 1 · 2017-06-26T13:01:36

Approx. #17%# #"v/v"#..........

We ASSUME (probably reasonably) that the volumes of water and ethyl alcohol are ADDITIVE.

And thus........... #%"v/v"="Volume of ethyl alcohol"/"Volume of ethyl alcohol + volume of water"xx100%#

#=(25*mL)/(25*mL+125*mL)xx100%=??%#

What is the concentration by volume if a solution is prepared by adding #25*mL# of #"ethyl alcohol"# to #125*mL# of water?