If you accidentally spill a small amount of hydrochloric acid (HCl) on your hand during a laboratory experiment, what is the appropriate first step to take?

• A. Immediately rinse the affected area with plenty of water for at least 15 minutes.
• B. Neutralize the acid with sodium hydroxide solution.
• C. Wipe the acid off with a dry paper towel.
• D. Ignore the spill if it does not cause pain.

Answer: (A)

Verified step by step guidance

1. Recognize that hydrochloric acid (HCl) is a corrosive substance that can cause chemical burns upon contact with skin.
2. Understand that the immediate goal is to minimize the acid's contact time with the skin to prevent damage.
3. Recall that the safest and most effective first response to acid spills on skin is to rinse the affected area thoroughly with plenty of water.
4. Know that rinsing should continue for at least 15 minutes to dilute and remove the acid completely.
5. Avoid neutralizing the acid on the skin with a base like sodium hydroxide, as this can cause an exothermic reaction and further injury.