While diluting acid, why is it correct to add acid slowly to water instead of water to acid?
Answer and explanation
Correct answer: Heat spreads through a larger volume and splashing is reduced
Dilution of a concentrated acid is highly exothermic because hydration of ions releases heat. Adding acid slowly to a larger volume of water allows the heat to spread through the water and be dissipated more safely. If water is poured into concentrated acid, the small amount of water may heat suddenly, boil, and eject acid droplets. Hence option A expresses the laboratory safety rule and is correct.
Frequently asked questions
What is the correct answer to this question?
Heat spreads through a larger volume and splashing is reduced
Why is this the correct answer?
Dilution of a concentrated acid is highly exothermic because hydration of ions releases heat. Adding acid slowly to a larger volume of water allows the heat to spread through the water and be dissipated more safely. If water is poured into concentrated acid, the small amount of water may heat suddenly, boil, and eject acid droplets. Hence option A expresses the laboratory safety rule and 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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
