Chem 高手請答**

2007-03-06 7:38 am

1. Zn(OH)2 + NaOH---------> Zn(OH)4 2-
我想問係點變ga, 可唔可以寫條full equation 出黎ar~ !!!!!!11plz
我都知ionic equation 係Zn(OH)2 +2OH- ------------> Zn(OH)4 2-

2.Zn (OH)2 + NH3 -----------> ZN(NH3) 4 2+
呢個ge full equation 又係點樣ga??

3.HCl 可唔可以dissolves in methylbenzene to form H+ ions?

4. HCl (dry ge) + NH3 (gas) 又咩reaction 會發生?

更新1:

我還是不太明白y 1.Zn(OH)2 + NaOH---------> Zn(OH)4 2- Zn(OH)4 2- 中點解會係2- ge?? 仲有你個條equation Zn(OH)2 + NaOH ----- Na2[ Zn(OH)4 ] 我不明白怎樣一下子變成的...請再解釋1次 Plz~

回答 (1)

Uncle Michael

2007-03-06 7:51 am

✔ 最佳答案

1.
It is better to write the ionic equation, because the ionic equation represents how the reaction goes.
The full equation is :
Zn(OH)2(s) + 2NaOH(aq) → Na2[Zn(OH)4](aq)

2.
Zn(OH)2(s) + 4NH3(aq) → [Zn(NH3)4](OH)2(aq)

3.
HCl can dissolve in methylbenzene, but cannot give H+ ions.
In the HCl solution of methylbenzene, HCl exists as molecules.

4.
Dense white fumes of ammonium chloride is formed.
NH3(g) + HCl(g) → NH4Cl(s)

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