Question

why should you only handle a clean crucible with crucible tongs?
the crucible is coated in a corrosive surface that could be harmful to you
touching the crucible with your bare hands will cause the reaction to occur if magnesium is present
the crucible is so fragile that it will shatter when touched
you do not want to contaminate the crucible with oils on your fingers or particles on your gloves
question 2
10 pts
when conducting your reaction, which of the following is a safety concern?
magnesium burns brightly enough to cause temporary blindness
magnesium is toxic and easily absorbed by skin
magnesium is incredibly corrosive and could cause serious chemical burns
magnesium reacts violently enough that some could fly out of the crucible toward your body

Explanation:

For the first question, oils from fingers or particles on gloves can contaminate a clean crucible, which can affect chemical reactions or analyses performed using it. For the second question, magnesium burns very brightly and the intense light can cause temporary blindness if proper eye - protection is not used.

Answer:

Question 1: You do not want to contaminate the crucible with oils on your fingers or particles on your gloves
Question 2: Magnesium burns brightly enough to cause temporary blindness