Why does the risk of splashing increase when an acid is mixed with water very quickly?
Answer and explanation
Correct answer: Heat released during dissolving can build up rapidly
Diluting many concentrated acids is exothermic: hydration of ions releases heat. If water is poured rapidly into acid, the small amount of water can heat suddenly, boil locally, and eject acid droplets. Adding acid slowly to a larger quantity of water allows heat to spread more safely. The hazard is therefore rapid heat release and splashing, not gas formation, solidification, or colour change. Option A is correct.
Frequently asked questions
What is the correct answer to this question?
Heat released during dissolving can build up rapidly
Why is this the correct answer?
Diluting many concentrated acids is exothermic: hydration of ions releases heat. If water is poured rapidly into acid, the small amount of water can heat suddenly, boil locally, and eject acid droplets. Adding acid slowly to a larger quantity of water allows heat to spread more safely. The hazard is therefore rapid heat release and splashing, not gas formation, solidification, or colour change. Option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
