While diluting acid, why should acid be added to water instead of adding water to acid?
Answer and explanation
Correct answer: Because heat spreads safely and splashing is reduced
The governing safety principle is that dilution of a concentrated acid is exothermic: hydration of the ions releases considerable heat. If a small amount of water is poured into concentrated acid, that water can heat rapidly, boil locally, and eject corrosive acid droplets. Adding acid slowly to a larger volume of water allows the released heat to spread through the water and permits controlled stirring and cooling. Therefore option A is correct. The other choices give chemically false reasons.
Frequently asked questions
What is the correct answer to this question?
Because heat spreads safely and splashing is reduced
Why is this the correct answer?
The governing safety principle is that dilution of a concentrated acid is exothermic: hydration of the ions releases considerable heat. If a small amount of water is poured into concentrated acid, that water can heat rapidly, boil locally, and eject corrosive acid droplets. Adding acid slowly to a larger volume of water allows the released heat to spread through the water and permits controlled stirring and cooling. Therefore option A is correct. The other choices give chemically false reasons.
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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