Posted by **Jean** on Monday, July 30, 2012 at 12:39am.

320ml of active ingredient is added to 680ml of an alcohol based solution. What is the final strength (v/v)? ___

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**DrBob222**, Monday, July 30, 2012 at 12:42am
Use your other posts as a template.

% v/v is mL solute/total mL and you assume the volumes are additive (which isn't the usual case).

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**Betty**, Monday, July 30, 2012 at 1:09am
I have posted correctly

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**Terri**, Thursday, October 18, 2012 at 9:32am
320ml of active ingredient is added to 680 ml of an alcohol based solution. What is the final strength (v/v)?________

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