Due to which ion does hydrochloric acid show acidity in water?
Answer and explanation
Correct answer: Hydrogen ion
Hydrochloric acid ionises almost completely in water: HCl(aq) → H+(aq) + Cl−(aq), with H+ more accurately represented in water as H3O+. The hydronium or hydrogen-ion concentration gives the solution its acidic properties and allows it to react with bases. Hydroxide ions indicate basicity, whereas sodium and carbonate ions are not produced by hydrochloric acid. Hence option A is correct.
Frequently asked questions
What is the correct answer to this question?
Hydrogen ion
Why is this the correct answer?
Hydrochloric acid ionises almost completely in water: HCl(aq) → H+(aq) + Cl−(aq), with H+ more accurately represented in water as H3O+. The hydronium or hydrogen-ion concentration gives the solution its acidic properties and allows it to react with bases. Hydroxide ions indicate basicity, whereas sodium and carbonate ions are not produced by hydrochloric acid. Hence 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.
