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If suitable amounts of hydrochloric acid and sodium hydroxide are mixed, what will mainly be present in the final solution?

Answer and explanation

Correct answer: Aqueous sodium chloride and water

“Suitable amounts” means the acid and base are present in the stoichiometric ratio needed for neutralisation. The reaction is \(\mathrm{HCl + NaOH \rightarrow NaCl + H_2O}\). Hence, the final solution mainly contains aqueous sodium chloride and water. Options B and C would apply only if HCl or NaOH, respectively, were taken in excess. Hydrogen gas is produced when an acid reacts with a suitable metal, not when it reacts with NaOH. Exam tip: recognise acid + base → salt + water as a neutralisation reaction.

Related tags

Neutralisation ReactionHydrochloric AcidSodium HydroxideAcids Bases SaltsSodium ChlorideClass 10 Science

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