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
Thanks!
I agree with E.
E is right
To determine which safety precaution is unnecessary for the 'Mass Percent of ASA' experiment, let's analyze each option:
A. Safety goggles should be worn. - This safety precaution is necessary as it helps protect the eyes from potential splashes or spills of chemicals.
B. Do not ingest the aspirin used in this experiment as it may be contaminated with other chemicals. - This precaution is necessary as ingesting chemicals used in the experiment can be hazardous to health.
C. The FeCl3 solution is acidic and corrosive. Skin contact should be avoided. - This precaution is necessary as skin contact with corrosive substances can lead to burns or other injuries.
D. 1M NaOH is basic and corrosive. Skin contact should be avoided. - This precaution is necessary as basic and corrosive substances can also cause burns or injuries when they come into contact with the skin.
E. All of these precautions are necessary - This option indicates that all the listed precautions are necessary for the experiment, which means none of them is unnecessary.
Thus, the answer is E. All of these precautions are necessary.