Why is care needed while mixing a strong base with water?
Answer and explanation
Correct answer: Heat may be released during dissolving
The governing concept is the exothermic nature of dissolving many strong bases. When a strong base such as sodium hydroxide dissolves, hydration of its ions releases heat. If the solid is added rapidly or water is added carelessly, the solution may heat suddenly and splash corrosive material. Therefore the substance should be added slowly with suitable protection. It does not normally freeze, become an acid, or convert water into oxygen. Option A is correct.
Frequently asked questions
What is the correct answer to this question?
Heat may be released during dissolving
Why is this the correct answer?
The governing concept is the exothermic nature of dissolving many strong bases. When a strong base such as sodium hydroxide dissolves, hydration of its ions releases heat. If the solid is added rapidly or water is added carelessly, the solution may heat suddenly and splash corrosive material. Therefore the substance should be added slowly with suitable protection. It does not normally freeze, become an acid, or convert water into oxygen. Option 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.
