Question

read the following information from a material safety data sheet (msds) about the chemical hydrochloric acid (hcl).
skin contact: in case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. wash clothing before reuse. thoroughly clean shoes before reuse. get medical attention immediately.
based on this information, which is the most important thing to do right away if a student spills hcl on his shirt?
remove the shirt, and rinse the skin with water.
remove the shirt, and find a sink to rinse it in.
get help from a classmate immediately.
call 911 to get medical attention immediately.

Explanation:

The MSDS clearly states "immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes". So, the key actions are removing the contaminated clothing (the shirt) and rinsing the skin (as the shirt was on the skin, so skin under it would be affected) with water.

Answer:

Remove the shirt, and rinse the skin with water.