When we purchase a bottle of liquor such as whiskey or gin, we often talk about

Question

When we purchase a bottle of liquor such as whiskey or gin, we often talk about "proof". (For example "30 proof" alcohol). What is the relationship between the proof and the percent alcohol in the bottle? a) What does v/v% mean? b) If I have 100 mL of wine that is 14 v/v% ethanol, how many mL of ethanol does it contain? What is vapor pressure? What is the effect on the boiling point of water if a nonvolatile substance such as NaCl is dissolved in it? What is the effect on the boiling point of a liquid if an insoluble substance such as sand charcoal is present?

Explanation / Answer

1) proof = 2* volume percent of alcohol content in the liquor.

30 proof alcohol is 15 volume percent of alcohol content.

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