Safety Exercise

What should you do if you can smell natural gas (rotten egg smell due to mercaptan additive) at your lab bench, even after the gas jets have been turned off?

Report it to the instructor

In order for the gas to work in the lab, the teacher must turn on the gas main (in prep room). Even if the main is off, why is it a bad idea to play with the gas jets? (Ex. open and close the jet)

The gas could leak into the room

Where should you dispose of a chemical that does not go down the drain?

Waste containers

When is it okay to dispose of solids in the sink?

Never, unless instructed otherwise

How does a fume hood work?

It takes in air (harmful gases and fire) from the lab and pumps it through the chimney to the outside of the building

What is the purpose of the fume hood?

Protects from gaseous substances and flames

Always work at least _____ inches inside the fume hood.

six (6)

The lab sinks are for washing hands and glassware. At the end of lab after you have cleaned up, should you first take off your goggles and then wash your hands, or the other way around? Why?

You must take off your goggles first because you will recontaminate your hands by touching the goggles if you washed them beforehand.

Is using hand sanitizer an acceptable way to clean your hands after a chemistry lab? Why or why not?

NO. You need to scrub off any chemicals that may have gotten into your hands with soap.

What items should not be left on the floor of the lab? (3)

1. backpacks

2. clothing

3. liquids

If your clothing catches fire, what are your choices? (2)

1. Stop, drop, and roll

2. Safety shower

Besides extinguishing fires, what is the other use of the safety shower?

rinsing chemical spills off one’s body

If you spill strong and/or concentrated acid/base, neutralize it with _____________________.

baking soda

Do not use the fire blanket on anyone who is ____________________.

standing up

What is the chimney effect?

Using the fire blanket on a person who is standing directs the flames towards their face

What are 3 things you should NEVER wear in the lab?

1. Loose/baggy clothing

2. Long, hanging hair

3. Synthetic fabrics (rayon)