Which of the following safety precautions is necessary for the 'Preparation of a Complex Iron Salt' experiment?
A. Oxalate compounds are easily absorbed through the skin and toxic to kidneys use gloves while handling.
B. Ethanol is flammable avoid ignition sources.
C. 3% H2O2 is a mild oxidizing agent avoid contact with the skin.
D. Sulfuric and oxalic acids can cause burns use gloves while handling.
E. All of these precautions are necessary.
is E correct?
Yes, I think E is the correct answer; however, I think C is overstated a bit.
To determine whether option E is correct, we need to analyze each of the safety precautions listed and determine if they are necessary for the "Preparation of a Complex Iron Salt" experiment:
A. Oxalate compounds are easily absorbed through the skin and toxic to kidneys, so using gloves while handling them is indeed a necessary safety precaution.
B. Ethanol is flammable, so it is important to avoid ignition sources when working with it. This precaution is also necessary.
C. 3% H2O2 (hydrogen peroxide) is a mild oxidizing agent, which means it can pose a risk if it comes into contact with the skin. Therefore, avoiding skin contact with the chemical is a necessary safety precaution.
D. Sulfuric and oxalic acids can cause burns, and thus using gloves while handling these acids is necessary to protect the skin.
Based on the analysis above, it can be concluded that all of the listed safety precautions are necessary for the "Preparation of a Complex Iron Salt" experiment. Therefore, option E, "All of these precautions are necessary," is correct.