A student is diluting concentrated sulphuric acid. Which method reduces the risk of splashing caused by the heat produced?
Answer and explanation
Correct answer: Add acid to water in small portions while stirring continuously
Dissolving concentrated sulphuric acid in water is exothermic. Adding the acid slowly to a larger volume of water while stirring lets the heat disperse, reducing sudden boiling and splashing. In contrast, adding water to acid can rapidly heat the small layer of water and cause it to splash.
Frequently asked questions
What is the correct answer to this question?
Add acid to water in small portions while stirring continuously
Why is this the correct answer?
Dissolving concentrated sulphuric acid in water is exothermic. Adding the acid slowly to a larger volume of water while stirring lets the heat disperse, reducing sudden boiling and splashing. In contrast, adding water to acid can rapidly heat the small layer of water and cause it to splash.
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.
