Question

Осуществите цепочку превращений: Zn→ZnO→Zn(NO)2→Zn(OH)2→ZnCl2

Answer 1

2Zn+O2→2ZnO
ZnO+2HNO3→Zn(NO3)2+H2O
Zn(NO3)2+2NaOH→Zn(OH)2+2NaNO3
Zn(OH)2+2HCl→ZnCl2+2H2O

Answer 2

Chain of Transformations: Zn → ZnO → Zn(NO)2 → Zn(OH)2 → ZnCl2

The given chain of transformations involves the element zinc (Zn) undergoing a series of reactions to form different compounds. Let's go through each step of the transformation chain:

1. Zn → ZnO: - Zinc (Zn) reacts with oxygen (O) to form zinc oxide (ZnO) [[6]](https://www.lib.tpu.ru/fulltext/m/2009/m11.pdf). - The balanced chemical equation for this reaction is: 2 Zn + O2 → 2 ZnO.

2. ZnO → Zn(NO)2: - Zinc oxide (ZnO) reacts with nitric acid (HNO3) to form zinc nitrate (Zn(NO)2). - The balanced chemical equation for this reaction is: ZnO + 2 HNO3 → Zn(NO)2 + H2O.

3. Zn(NO)2 → Zn(OH)2: - Zinc nitrate (Zn(NO)2) reacts with sodium hydroxide (NaOH) to form zinc hydroxide (Zn(OH)2) [[7]](https://invat.blob.core.windows.net/manuals/9%20%D0%BA%D0%BB%D0%B0%D1%81%D1%81-ru-%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F-2016-.pdf). - The balanced chemical equation for this reaction is: Zn(NO)2 + 2 NaOH → Zn(OH)2 + 2 NaNO3.

4. Zn(OH)2 → ZnCl2: - Zinc hydroxide (Zn(OH)2) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) [[8]](https://sch2.edu.sbor.net/fileadmin/user_upload/KHimija_8-9.pdf). - The balanced chemical equation for this reaction is: Zn(OH)2 + 2 HCl → ZnCl2 + 2 H2O.

So, the complete chain of transformations is as follows: Zn → ZnO → Zn(NO)2 → Zn(OH)2 → ZnCl2.

Please note that the specific conditions and concentrations of the reactants may vary in practical applications, and these equations represent the general reactions involved in the transformation chain.

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