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Solution - Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals

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Question

Complete the following chemical equation

8MnO4- + 3S2O32- + H2O →

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For M2+/M and M3+/M2+ systems, the `E^theta` values for some metals are as follows:

Cr2+/Cr −0.9V

Cr3/Cr2+ −0.4 V

Mn2+/Mn −1.2V

Mn3+ /Mn2+ +1.5 V

Fe2+ /Fe −0.4V

Fe3+/Fe2+ +0.8 V

Use this data to comment upon:

(i) The stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ and

(ii) The ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal.

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How would you account for the following:

Of the d4species, Cr2+ is strongly reducing while manganese(III) is strongly oxidising.

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Complete the following equation:

`2MnO_4^-`

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Complete the following equation :

`2MnO_4^(-)+6H^++5NO_2^(-)rarr`

 

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Complete the following equation :

MnO4- + 8H+ + 5e- →

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Reference Material

Solution for concept: Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science), PUC Karnataka Science
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