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hydrogen fuel cell
-ve:
O2+2H2O+4e--> 4OH-
+VE:
H2+1/2O2--> H2O
LITHIUM ION CELL
-ve:
Li--> Li+ + e-
+ve:
Li+ CoO2 +e---> Li+[CoO2]-
[Cr(H2O)6]2+
red violet
solution
[Cr(NH3)6]3+
purple
solution
Cr(OH)3(H2O)3
Green
ppt
Co(H2O)4(OH)2
Blue- Green
ppt
[CoCl4]2-
blue
solution
[Co(H2O)6]2+
pink
solution
[Co(NH3)6]2+
Straw coloured
solution
[Co(NH3)6]3+
Brown
solution
[Fe(H2O)6]3+
Violet solution appears
yellow
Fe(H2O)3(OH)3
brown
ppt
[Fe(H2O)6]2+
Pale green solution
Fe(H2O)4(OH)2
Green
ppt
[CuCl4]2-
yellow- green solution
[Cu(NH3)4(H2O)2]2+
Deep blue solution
[Cu(H2O)6]2+
BLUE SOLUTION
Cu(H2O)4(OH)2
Blue
ppt
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