Why is it dangerous to add water to a concentrated acid during dilution?
Answer and explanation
Correct answer: A large release of heat can cause splashing
Dilution of a concentrated acid is highly exothermic, meaning that considerable heat is released when water and acid mix. If a small amount of water is poured into the acid, the water may heat rapidly, boil locally, and eject acid droplets. These droplets can cause serious chemical burns. The safe laboratory rule is to add acid slowly to a larger volume of water while stirring and wearing protection. The other choices contradict the actual thermal behaviour.
Frequently asked questions
What is the correct answer to this question?
A large release of heat can cause splashing
Why is this the correct answer?
Dilution of a concentrated acid is highly exothermic, meaning that considerable heat is released when water and acid mix. If a small amount of water is poured into the acid, the water may heat rapidly, boil locally, and eject acid droplets. These droplets can cause serious chemical burns. The safe laboratory rule is to add acid slowly to a larger volume of water while stirring and wearing protection. The other choices contradict the actual thermal behaviour.
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.
