Why should acid always be added slowly to water while diluting?
Answer and explanation
Correct answer: To avoid sudden heat and splashing
Dilution of a concentrated acid is strongly exothermic: hydration of acid particles releases considerable heat. If water is poured rapidly into concentrated acid, the small amount of water may heat suddenly, boil, and throw corrosive acid droplets outward. Adding acid slowly to a larger volume of water, with stirring, spreads the heat safely. Thus option A states the correct laboratory safety principle.
Frequently asked questions
What is the correct answer to this question?
To avoid sudden heat and splashing
Why is this the correct answer?
Dilution of a concentrated acid is strongly exothermic: hydration of acid particles releases considerable heat. If water is poured rapidly into concentrated acid, the small amount of water may heat suddenly, boil, and throw corrosive acid droplets outward. Adding acid slowly to a larger volume of water, with stirring, spreads the heat safely. Thus option A states the correct laboratory safety principle.
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.
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