Final answer:
If ammonia gets on the skin, it should be washed off for at least 15 minutes with plenty of water, and medical attention should be sought if irritation persists.
Step-by-step explanation:
If ammonia gets on the skin, it is recommended to wash the affected area immediately with plenty of water for at least 15 minutes. It is important to remove any contaminated clothing and continue rinsing to ensure all traces of ammonia are removed from the skin. After washing the skin thoroughly, if irritation or pain persists, it's advisable to seek medical attention to prevent any potential damage or chemical burns, as ammonia can be a corrosive substance.