विधुत रासायनिक श्रेणी या सक्रियता श्रेणी के गुण या लक्षण Electrochemical range
तत्वों को मानक अपचयन के बढ़ते हुए क्रम में रखने पर जो श्रेणी प्राप्त होती है उसे विधुत रासायनिक श्रेणी या सक्रियता श्रेणी कहते हैं।
|
अभिक्रिया
|
E0(volt) में
|
|
Li+ + e–
→ Li |
-3.05
|
|
K+ + e–
→ K |
-2.97
|
|
Ca2+ + 2e–
→ Ca |
-2.87
|
|
Na+ + e– →
Na |
-2.71
|
|
Mg2+ + 2e–
→ Mg |
-2.36
|
|
Al3+ + 3e–
→ Al |
-1.66
|
|
2H2O + 2e–
→ H2 + 2OH– |
-0.83
|
|
Zn2+ + 2e–
→ Zn |
-0.76
|
|
Cr3+ + 3e– → Cr
|
-0.74
|
|
Fe2+ + 2e–
→ Fe |
-0.44
|
|
Ni2+ + 2e– →
Ni |
-0.25
|
|
Sn2+ + 2e– →
Sn |
-0.14
|
|
Pb2+ + 2e– →
Pb |
-0.13
|
|
2H+ + 2e–
→ H2 |
0.0
|
|
AgBr + e– →
Ag + Br– |
+0.10
|
|
AgCl + e– →
Ag + Cl– |
+0.22
|
|
Cu2+ + 2e– →
Cu |
+0.34
|
|
Cu+ + e–
→ Cu |
+0.52
|
|
I2 + 2e– →
2I– |
+0.54
|
|
O2 + 2H+
+ 2e– → H2O2 |
+0.68
|
|
Fe3+ + e–
→ Fe2+ |
+0.77
|
|
Ag+ + e– →
Ag |
+0.80
|
|
2Hg+ + 2e–
→ Hg2 |
+0.92
|
|
NO3– +
4H+ + 3e– → NO + 2H2O |
+0.97
|
|
Br2 + 2e– → 2Br–
|
+1.09
|
|
MnO2 + 4H+
+ 4e– → Mn2+ + 2H2O |
+1.23
|
|
O2 + 4H+
+ 4e– → 2H2O |
+1.23
|
|
Cr2O72-
+ 14H+ + 6e– → 2Cr3+ + 7H2O |
+1.33
|
|
Cl2 + 2e–
→ 2Cl– |
+1.36
|
|
Au3+ + 3e– → Au
|
+1.40
|
|
MnO4–
+ 8H+ + 5e– → Mn2+ + 2H2O |
+1.51
|
|
H2O
+ 2H+ + 2e– →2H2O |
+1.78
|
|
CO3+ + e–
→ CO2+ |
+1.81
|
|
F2 + 2e– → 2F–
|
+2.87
|
विधुत रासायनिक श्रेणी के गुण या लक्षण (Electrochemical range properties) :
+ 2e– → Ni (-0.25)
, F2 , I2 को ऑक्सीकारक गुणों के बढ़ते क्रम में लिखो।
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