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Among hydrochloric acid and ethanoic acid of equal concentration, which acid shows higher electrical conductivity and why?

Answer and explanation

Correct answer: Hydrochloric acid because it forms more ions

The governing concept is electrical conduction by mobile ions and the distinction between strong and weak acids. At equal concentration, hydrochloric acid ionises almost completely in water, producing many H3O+ and Cl− ions. Ethanoic acid is weak and only partially ionises, so it supplies fewer charge carriers. Consequently HCl has higher conductivity, making option A correct. Equal labels as acids do not imply equal ionisation, and option B contradicts the stated equal concentration.

Related tags

Electrical ConductivityStrong AcidsWeak AcidsIonisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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