posted by Shawn Tabrizi .
Which of the following safety precautions is unnecessary for the 'Mass Percent of ASA' experiment?
A. Safety goggles should be worn.
B. Do not ingest the aspirin used in this experiment as it may be contaminated with other chemicals.
C. The FeCl3solution is acidic and corrosive. Skin contact should be avoided.
D. 1M NaOH is basic and corrosive. Skin contact should be avoided.
E. All of these precautions are necessary