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I(2)+S(2)O(3)^(2-) to I^(-)+S(4)O(6)^(2-...

`I_(2)+S_(2)O_(3)^(2-) to I^(-)+S_(4)O_(6)^(2-)`

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Used millimoles of `I_(2)` = (m.moles of `I_(2)` taken initially)-`("m.moles of hypo used")/(2)`
`=0.005xx10-0.002xx(10)/(2)`
`=0.04 = "millimoles of " H_(2)S`
`:. ` Weight of sulphur `=0.04xx10^(-3)xx32xx10^(3)mg=1.28 mg`.
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In the reaction, I_(2)+2S_(2)O_(3)^(2-) rarr 2I^(-)+S_(4)O_(6)^(2-) .

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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)

RESONANCE ENGLISH-EQUIVALENT CONCEPT & TITRATIONS-Part -IV
  1. I(2)+S(2)O(3)^(2-) to I^(-)+S(4)O(6)^(2-)

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  2. Volume V1 mL of 0.1 M K2Cr2O7 is needed for complete oxidation of 0.67...

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  3. KMnO(4) oxidises I^(-) to I(2) in acidic medium. The equivalent wei...

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  4. 10 mL of 1 NHCl is mixed with 20 mL of 1MH(2)SO(4) and 30 mL of 1M NaO...

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  5. 20mL of H(2)O(2) after acidification with dilute H(2)SO(4) required 30...

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  6. As(2)S(3) is

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  7. During the titration of a mixture of Na(2)CO(3) and NaHCO(3) against H...

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  8. In the reaction CrO(5) + H(2)SO(4)rarr Cr(2)(sO(4))(3)+H(2)O+O(2), one...

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  9. Consider the redox reaction 2S(2)O(3)^(2-)+I(2)rarrS(4)O(6)^(2-)+2I^...

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  10. Which of the following relations is/are correct for solutions ?

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  11. Which of the following statements is/are correct

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  12. H(2)C(2)O(4) and NaHC(2)O(4) behave as acids as well as reducing agent...

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  13. Consider the reactions shown below : Which of the follwoing state...

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  14. 3 " mol of "a mixture of FeSO(4) and Fe(2)(SO(4))(3) requried 100 " mL...

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  15. A 7.1 g sample of bleaching powder suspended in H(2)O was treated with...

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  16. If the number of N-atoms in 1 molecule of Hyponitrous acid is x and th...

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  17. Find the valency factor (n) for NH(2)OH in given reaction : Fe^(3+)+...

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  18. A solution of Na(2)S(2)O(3) is standardized iodometrically against 0.1...

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  19. 2 moles of a mixture of O(2) and O(3) is reacted with excess of acidi...

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  20. The overall equation for the reaction between sodium carbonate solutio...

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  21. The overall equation for the reaction between sodium carbonate solutio...

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