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Why is HCl not used to acidify a permang...

Why is HCl not used to acidify a permanganate solution in volumetric estimation of `Fe^(2 + ) or C_2O_4^(2-)` ?

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`KMnO_4` oxidies HCl to chlorine.
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Assertion : Hydrochloric acid is not used to acidify a KMnO_(4) solution in volumetric analysis of Fe^(2+) and C_(2) O_(4)^(2-) because. Reason : Part of the oxygen produced from KMnO_(4) and HCl is used up in oxidising HCl to Cl_(2) .

Hydroxylamine reduce iron (III) according to the equation : 2NH_(2)OH + 4 Fe^(3+) rarr N_(2)O(g)uarr + H_(2)O + 4Fe^(2+) + 4H^(+) Iron (II) thus produced is estimated by titration with a standard permanganate solution. The reaction is MnO_(4)^(-) + 5 Fe^(2+) + 8H^(+) rarr Mn^(2+) + 5Fe^(3+) + 4H_(2)O A 10 mL sample of hydroxylamine solution was diluted to 1 litre. 50 mL of this diluted solution was boiled with an excess of iron (III) solution. The resulting solution required 12 mL of 0.02 M KMnO_(4) solution for complete oxidation of iron (II). Calculate the weight of hydroxylamine in one litre of the original solution

What is the coordination number of [Fe(C_2O_4)_3]^(3-) ?

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron(II) ions (ii) SO_(2) and (iii) oxalic acid? Write the ionic equations for the reactions.

An organic compund A with molecular formula C_(3)H_(8)O_(3) reacts with oxalic acid at 110°C to give a monocarboxylic acid B. B gives a silver mirror with Tollens' reagent and reduces acidified potassium permanganate solution. Identify A and B and give the reaction of B with acidified KMnO_(4) solution.

Estimation of oxidising substance involving the liberation of I_(2) and subsequent volumetric estimation of I_(2) are refferred to as 2Cu^(2+)+4I^(Theta)rarr Cu_(2)I_(2)+I_(2) I_(2)+ S_(2)O_(3)^(2-)rarr S_(4)O_(6)^(2-)+2I^(Theta)

What happens when: a. Chromium hydroxide is treated with hydrogen peroxide in the presence of sodium hydroxide. b. Hydrogen peroxide is added to ferrous ammonium sulphate solution. c. hydrogen peroxide is added to acidified potassium permanganate. d. An alkaline solution of potassium ferricyanide is reacted with H_(2)O_(2) .

What happens when H_(2)O_(2) is treated with acidified potassium permanganate solution?

What is the oxidation number of Fe in K_(3)[Fe(C_(2)O_(4))_(3)] ?

What is the oxidation number of Fe in K_(3)[Fe(C_(2)O_(4))_(3)] ?

ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. What is Baeyer's reagent ?

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  2. Why is KMnO4 kept in dark bottles ?

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  3. Why is HCl not used to acidify a permanganate solution in volumetric e...

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  4. Why is K(2)Cr(2)O7 generally preferred over Na(2)Cr(2)O(7) , in volume...

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  5. What happens when chromates are kept in acidic solution and dichromate...

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  6. In permanganate ion, all the bonds formed between Mn and oxygen are co...

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  7. Why lanthanoids and actinoids are called f-block elements?

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  8. What is the maximum oxidation state in actinoids?

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  9. State the common characteristic of lanthanoids and actanoids which pla...

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  10. Give the general electronic configuration of actinoids

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  11. The size of the trivalent cations in the lanthanoid series decreases s...

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  12. Out of the following identify (i) the *d' block element (ii) the of bl...

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  13. State a consequence of lanthanoid contraction shown by transition elem...

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  14. Write outer electronic configuration of lanthanoids.

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  15. Which trivalent cation is largest in lanthanoid series ?

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  16. Write any two uses of pyrophoric alloys.

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  17. Write are non-stoichimetric oxides ? Give one example.

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  18. Give one use each of (i) niobium (ii) tantalum.

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  19. Give two properties in which interstitial compounds differ from its el...

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  20. Why is copper-29 considered a transition metal?

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