Question

Experiment 10 

Breathalyzer Reaction: PRELAB 

1. The device used to measure the alcohol content of a person's breath is the 

2. The breathalyzer test is based on the fact that the concentration of alcohol in one's is directly proportional to the concentration of alcohol in one's blood. 

3. There are many different compounds that are classified as alcohols. For example, the alcohol found in rubbing alcohol is a different chemical compound than the alcohol present in alcoholic beverages. Ethanol is the name of the alcohol in alcoholic beverages. What is the chemical formula for ethanol? 

4. The color of dichromate ion in solution is 

The color of chromium ion in solution is 

5. If a beverage labeled as 120 Proof, what is the percentage of alcohol present there by volume? 

6. Which chemical should you handle with care in this experiment (see next page)? 

What is the first thing you should do if you get some on your skin? 

Answer 1

Q1.

typically known as a breathanalytzer or alcoholimeter

Q2

one's body/ blood

Q3

CH3CH2OH or C2H5OH also C2H6O

Q4

dichromate solution = orange

chromate solution = yellow

Q5

120 proof = 120/2 = 60% alcohol by volume

Q6

dichromate, since it oxidizes readily

if there is some in skin, then get directly to wash it for at least 5 -10 mins