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Acid fundamentals (core element): Which chemical element is common to all acids? Think of the ion released by acids in aqueous solution per Arrhenius/Brønsted concepts. Choose the correct element.

Difficulty: Easy

Correct Answer: Hydrogen

Explanation:

What is being asked?The element present in all acids.

Given data

  • Definition: Acids donate H+ (Arrhenius/Brønsted)

Concept/ApproachAll acids contain hydrogen because acidity arises from the ability to donate a proton (H+), e.g., HCl, H2SO4, CH3COOH.

Final AnswerHydrogen

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