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

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Indicate the steps in the preparation of K2Cr2O7 from chromite ore.

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Complete the following equation:

2MnO_4^-

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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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Complete the following equations :

2 MnO2 + 4 KOH + O2 →

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Complete the following equations:

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Complete the following chemical equation

8MnO4- + 3S2O32- + H2O →

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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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