Question

осуществите схему превращений укажите тип химической реакции Na-NaOH-Na2S-NaCl-HCl-ZnCl2-Zn(OH)2-ZnO-Zn​

Answer 1

2Na+2H2O=2NaOH+H2  - реакция замещения

2NaOH+H2S=Na2S+2H2O- реакция обмена

Na2S+2HCl=2NaCl+H2S - реакция обмена

2NaCl+H2SO4=Na2SO4+2HCl- реакция обмена

2HCl+Zn=ZnCl2+H2 - реакция замещения

ZnCl2+2NaOH=2NaCl+Zn(OH)2- реакция обмена

Zn(OH)2=ZnO+H2O - реакция разложения

ZnO+H2=Zn+H2O - реакция замещения

Answer 2

Chemical Reaction Scheme and Types of Reactions

The given chemical reactions involve the transformation of sodium (Na) into various compounds. Let's break down the reactions and identify the type of chemical reactions involved.

1. Na → NaOH - This is a single displacement reaction where sodium displaces hydrogen from water to form sodium hydroxide and hydrogen gas. - The chemical equation is: ``` 2Na + 2H2O → 2NaOH + H2 ```

2. NaOH → Na2S - This transformation involves the reaction of sodium hydroxide with sulfur to form sodium sulfide. - The chemical equation is: ``` 2NaOH + S → Na2S + H2O ```

3. Na2S → NaCl - This is a single displacement reaction where sodium sulfide reacts with hydrochloric acid to form sodium chloride and hydrogen sulfide gas. - The chemical equation is: ``` Na2S + 2HCl → 2NaCl + H2S ```

4. NaCl → HCl - This is not a transformation but a dissociation of sodium chloride into its ions in water. - The chemical equation is: ``` NaCl + H2O → Na+ + Cl- + H2O ```

5. HCl → ZnCl2 - This is a single displacement reaction where hydrochloric acid reacts with zinc to form zinc chloride and hydrogen gas. - The chemical equation is: ``` Zn + 2HCl → ZnCl2 + H2 ```

6. ZnCl2 → Zn(OH)2 - This transformation involves the reaction of zinc chloride with sodium hydroxide to form zinc hydroxide and sodium chloride. - The chemical equation is: ``` ZnCl2 + 2NaOH → Zn(OH)2 + 2NaCl ```

7. Zn(OH)2 → ZnO - This is a decomposition reaction where zinc hydroxide decomposes to form zinc oxide and water. - The chemical equation is: ``` Zn(OH)2 → ZnO + H2O ```

8. ZnO → Zn - This is a reduction reaction where zinc oxide is reduced to elemental zinc by heating. - The chemical equation is: ``` ZnO + C → Zn + CO ```

In summary, the types of chemical reactions involved in the given transformations include single displacement, dissociation, decomposition, and reduction reactions.

[[1 #1]], [[2 #2]], [[3 #3]], [[4 #4]], [[5 #5]]