Which ion does hydrochloric acid give in water?
Answer and explanation
Correct answer: Hydrogen ion
The governing concept is the ionisation of acids in water. Hydrochloric acid dissociates almost completely: HCl(aq) → H⁺(aq) + Cl⁻(aq), with H⁺ commonly represented as hydronium, H₃O⁺, in water. Thus option A is correct. Hydroxide ions indicate bases, carbonate ions come from carbonates, and sodium ions are not present in pure 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. Hydrochloric acid dissociates almost completely: HCl(aq) → H⁺(aq) + Cl⁻(aq), with H⁺ commonly represented as hydronium, H₃O⁺, in water. Thus option A is correct. Hydroxide ions indicate bases, carbonate ions come from carbonates, and sodium ions are not present in pure 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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