1- Sigma Aldrich is a popular chemical manufacturer. Go to the website (https://www.sigmaaldrich.com/united-states.html) and search for the chemical...

1- Sigma Aldrich is a popular chemical manufacturer. Go to the website (https://www.sigmaaldrich.com/united-states.html) and search for the chemical hydrochloric acid, ACS Reagent 37%. Open the Safety Data Sheet (SDS). Use the SDS to identify the NFPA rating for HCl.

Blank # 1: Health Rating

Blank # 2: Fire Rating

Blank # 3: Reactivity Rating

Question 21 options:

Blank # 1-------

Blank # 2--------

Blank # 3---------

2- Gases can have both mechanical and chemical hazards.

• True
• False

heating a crucible over a bunsen burner. The crucible is sitting on an iron mesh gauze over the flame. How should you remove the crucible?

• Pick it up with paper towels and gloved hands.

• Pick it up at he lid.

• Pick it up with crucible tongs.

• Pick it up with your gloved hands.

5-Before starting an experiment, which of the following steps should be taken?

• Look up and understand the chemical hazards.

• Review safety signs in the laboratory. 

• Prepare hazardous waste container with the appropriate label.

• All of the above

6- How long should you rinse your eyes after being exposed to a chemical?

• 20 minutes

• 5 minutes

• 10 minutes

• 15 minutes