plumlove asked:


A solution that is 95% ethanol is 190 proof. What is the molarity of ethanol in a vermouth drink, if the vermouth is 36 proof? The density of ethanol is 0.78 g/mL

For 36 proof I figured its 18%. I got an answer of 3.05 M of ethanol, but I’m not sure.

Kansieo.com

1 Comment so far

1. steve_geo1 June 18, 2009 11:50 pm

   36 proof = 18% ethanol = 18g ethanol/100mL vermouth

   Atomic weights: C=12 H=1 O=16 C2H5OH=46

   Let ethanol be called E. Let vermouth be called V.

   18gE/100mLV x 1molE/46gE x 1000mLV/1LV = 3.9 mole/L

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