Percetnage by volume of propanol from original volumes

[lavster]

if i had 500ml of water and added 250ml of propanol, how would I go about working out its percentage by volume?

thanks

 

[sjb-2812]

What is the total volume?

 

[Yanick]

It depends on what level of accuracy you need to work in. For many applications simply adding the volumes will yield an acceptable answer. However, volumes are not necessarily additive, and very precise work would use the partial molar volumes to determine such things.

For further reading: Partial Molar Property on Wikipedia