Question

when diluting a concentrated acid, the rule is to:
add acid and water simultaneously.
add acid to water.
add water to acid.
not use acid in the lab.
question 13 (mandatory) (0.5 points)
if you splash a chemical into your eyes, you must:
wipe the chemical out with a paper towel.
flush the eyes with water for at least 5 minutes.
quickly go to the health services office.
flush the eyes with water for at least 15 minutes.

Explanation:

First Question (Diluting Concentrated Acid)

When diluting concentrated acid, adding acid to water is the correct rule. Adding water to acid is dangerous as the acid can splash due to the intense heat released. Adding simultaneously or not using acid in lab are incorrect.

If a chemical splashes into eyes, the correct procedure is to flush eyes with water for at least 15 minutes. Flushing for 5 minutes is insufficient, wiping with paper towel can cause more harm, and going to health services office without initial flushing is wrong.

Answer:

B. add acid to water (assuming the options are labeled as A: add acid and water simultaneously, B: add acid to water, C: add water to acid, D: not use acid in the lab)

Second Question (Chemical in Eyes)