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標題: [Chem] Zinc metal reacts with acids [打印本頁]

作者: CSLO 時間: 2015-12-22 06:21 PM 標題: Zinc metal reacts with acids

Describe the differences.
1. dil HCl
2. dil HNO3
3. conc HNO3

Which are REDOX reactions??

作者: 可米 時間: 2015-12-22 06:31 PM

all

作者: marcoc 時間: 2015-12-22 07:51 PM

1. 2HCl+Zn->ZnCl2+H2
2. 3Zn+8HNO3-> 3Zn(NO3)2+2NO +4H2O
3. Zn + 4HNO3 -> Zn(NO3)2 + 2H2O + 2NO2
All are redox reactions.

作者: CSLO 時間: 2015-12-23 07:14 AM

conc HNO3 gives NO2, dil HNO3 gives NO

Why???

作者: marcoc 時間: 2015-12-23 07:26 PM

http://chemistry.stackexchange.c ... -concentrated-nitri
Hope this is useful!

作者: CSLO 時間: 2015-12-24 09:18 PM

離題了,,,,
Nernst eqn 都是太多限制

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