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Describe the oxidising action of potassi...

Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with: (i) Iodide (ii) Iron (ii) Solution (iii) 'f(H2s

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(K)_(:) (Cr)_(2) (O)_(2)+4 (H)_(2) (SO)_(4) rarr (K)_(2) (SO)_(4)+(Cr)_(2)(SO)_(4)_(3). or in ionic form .+4 (H)_(2) (O)+3[0]. .(Cr)_(2) (O)_(7)^(2-)+14 (H)^(+)+6 (e)^(prime) rarr 2 (Cr)^(3+)+7 (H)_(2) (O). reduction .therefore (Cr)_(2) (O)_(7)^(2-). in acid medium is "a -strong oxidizing agent. i. It oxidizes .f(I)^(-). to .f(I)_(2). .(Cr)_(2) (O)_(7)^(2-)+14 (H)^(+)+6 (r)^(-) rarr 2 (Cr)^(3)+3 (I)_(21)+(TH)_(2) (O). ii. It oxidizes Fe (II) to Fe (II) in acidic solution.
(Cr)_(2) (O)_(7)^(2-)+14 (H)^(+)+6 (Fe)^(2+) rarr 2 (Cr)^(3+)+6 (Fe)^(3+)+7 (H) (O) ...
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V PUBLICATION-THE d- AND f- BLOCK ELEMENTS-QUESTION BANK
  1. In what way is the electronic configuration of the transition elements...

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  2. Describe the preparation of potassium dichromate from iron chromite or...

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  3. Describe the oxidising action of potassium dichromate and write the io...

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  4. Describe the preparation of potassium permanganate, How does the acidi...

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  5. For (M)^(2 *) / (M) and (M)^(3+) / (M)^(2+) systems the (E)^(0) values...

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  6. Predict which of the following will be coloured Fe^(3+) and Co^(2+). G...

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  7. Compare the stability of +2 oxidation state for the elements of the fi...

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  8. Compare the chemistry of actinoids with that of the lantlanoids with s...

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  9. How would you account for the following: i. Of the dot d^(4) species, ...

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  10. What is meant by "disproportionation'? Give two examples of disproport...

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  11. Which metal in the first series of transition metals exhibits +1 oxida...

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  12. Calculate the number of unpaired electrons in the following gaseous io...

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  13. Give example and suggest reasons for the following features of the tra...

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  14. Describe the method of preparation of potassium dichromate from chromi...

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  15. What are alloys? Name an important alloy which contains some of the la...

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  16. What are inner transition elements? Decide which of the following atom...

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  17. The chemistry of the actinoid elements is not so smooth as that of the...

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  18. Which is the last element in the series of the actinoids? Write the el...

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  19. Use Hund's' rule to derive the electronic configuration of '(Ce)^(3+)'...

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  20. Name the members. of the lanthanide series which exhibit +4 oxidation ...

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