1)Which element is oxidized in the reaction below? I2O5 (s) + 5CO(g) produces I2

Question

1)Which element is oxidized in the reaction below?

I2O5 (s) + 5CO(g) produces I2 (s) + 5CO2 (g)

I

O

C

I2

2) Table 20.2

Half Reaction                                                                       E(V)

Cr3+ (aq) + 3 electrons produces Cr(s)                  -0.74            

Fe 2+ + 2 electrons produces Fe                              -0.440

Fe3+ 1 electron produces Fe2+                            +0.771

Sn4+ 2 electrons produces Sn2+                              +0.154

The standard Cell potential (Ecell) for the Voltaic cell based on the reaction below is _______ V.

Sn2+ + 2FE3+ produces 2Fe2+ + Sn4+

+0.46

+o.617

+1.39

–0.46

+1.21

Explanation / Answer

1

in the given reaction CO converted CO2

so answer C

2

E0 cell = reduction potential - oxidation potential

here Fe3+ is getting reducing and

Sn2+ getting oxideising

E0Cell = 0.77 - 0.154

= 0.617 V

option-2 is the correct answer

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