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A student says all acids give the same amount of hydrogen gas with metals. Why is this statement wrong?

Answer and explanation

Correct answer: Gas amount depends on acid concentration, metal, and quantity

The governing concept is the acid–metal displacement reaction, in which a suitable metal can displace hydrogen from an acid: metal + acid → salt + hydrogen. The amount of gas depends on the moles and concentration of acid, the amount and reactivity of the metal, and whether a reactant becomes limiting. Therefore equal amounts cannot be assumed. The distractors incorrectly claim oxygen formation, no reaction, or water as the only source.

Related tags

Acid-Metal ReactionHydrogen GasReactivityAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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