What do you need to add HCl to make ZnO?

It is impossible to directly obtain zinc oxide using hydrochloric acid. Zinc oxide is produced by the reaction of zinc with oxygen or by the decomposition of zinc hydroxide by heating, like all insoluble bases. Several successive transformations can be proposed:
1) Zn + 2 HCl = ZnCl2 + H2 (substitution reaction)
2) ZnCl2 + 2 NaOH = Zn (OH) 2 + 2 NaCl (exchange reaction) – for this reaction, you can take any alkali instead of NaOH, that is, a soluble base
3) Zn (OH) 2 = ZnO + H2O (decomposition reaction)

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