While diluting a concentrated acid, acid should be added slowly to water. What is the main reason?
Answer and explanation
Correct answer: The process is exothermic and the risk of splashing is reduced
The governing concept is safe dilution of a concentrated acid. Mixing acid and water releases considerable heat, so the process is exothermic. Adding acid slowly to a larger volume of water allows the heat to disperse and reduces the chance of sudden boiling and splashing. The reverse procedure can eject hot corrosive droplets and cause serious burns. Water does not solidify the acid, and density or colour is irrelevant. Thus A is correct.
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What is the correct answer to this question?
The process is exothermic and the risk of splashing is reduced
Why is this the correct answer?
The governing concept is safe dilution of a concentrated acid. Mixing acid and water releases considerable heat, so the process is exothermic. Adding acid slowly to a larger volume of water allows the heat to disperse and reduces the chance of sudden boiling and splashing. The reverse procedure can eject hot corrosive droplets and cause serious burns. Water does not solidify the acid, and density or colour is irrelevant. Thus 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.
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