Reaction of zinc with hydrochloric acid
The dissolution of zinc in hydrochloric acid produces hydrogen gas.
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Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride
A colourless gas with a pungent odour, its solution in water is called hydrochloric acid.
The presence of hydronium ions relative to hydroxide ions determines a solution´s pH.
During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.
Common salt is dissolved by water: polar water molecules form a coat around the ions.
Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.