<P> The conversion of ethanol (CH CH OH) and oxygen (O) to acetic acid (CH COOH) takes place by the following reaction: </P> <Dl> <Dd> CH CH OH + O → CH COOH + H O </Dd> </Dl> <Dd> CH CH OH + O → CH COOH + H O </Dd> <P> Vinegar has been made and used by people for thousands of years . Traces of it have been found in Egyptian urns from around 3000 BC . </P>

What is the acidity of red wine vinegar