When a small amount of acid is mixed with water, the amount of which ion increases in the solution?
Answer and explanation
Correct answer: Hydrogen ion
The governing concept is the ionisation of acids in water. An acid produces hydrogen ions in aqueous solution; more precisely, these hydrogen ions associate with water to form hydronium ions, H₃O⁺. Therefore the concentration of the acidic hydrogen-ion species increases, making option B correct. Hydroxide ions are associated with basicity, carbonate ions are not produced by every acid, and chloride ions occur only with particular acids such as hydrochloric acid.
Frequently asked questions
What is the correct answer to this question?
Hydrogen ion
Why is this the correct answer?
The governing concept is the ionisation of acids in water. An acid produces hydrogen ions in aqueous solution; more precisely, these hydrogen ions associate with water to form hydronium ions, H₃O⁺. Therefore the concentration of the acidic hydrogen-ion species increases, making option B correct. Hydroxide ions are associated with basicity, carbonate ions are not produced by every acid, and chloride ions occur only with particular acids such as hydrochloric acid.
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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