Describe the oxidising action of potassium dichromate and write the ionic equations for its. With (i) iodide (ii) iron (II) solution (iii) `H_(2)S` an

Question

Describe the oxidising action of potassium dichromate and write the ionic equations for its. With (i) iodide (ii) iron (II) solution (iii) `H_(2)S` an

Describe the oxidising action of potassium dichromate and write the ionic equations for its.
With (i) iodide (ii) iron (II) solution (iii) `H_(2)S` and (iv) Sn(II)

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Related Questions

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron(II) ions (ii) `SO_(2)` and (iii)

2 Answers 4 Views

Two compounds [A] and [B] have molecular formula `C_(2)H_(6)O.` On reacting with HI [A] gives alkyl iodide and water while [B] gives alkyl iodide and

2 Answers 4 Views

Wrought iron is the purest form of iron. Write a reation used for the preparation of wrought iron from cast iron. How can the impurities of sulphur, s

2 Answers 4 Views

The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Exp

2 Answers 4 Views

Acidified potassium dichromate reacts with potassium iodide and oxidiese it to `I_2`. What is the oxidation state of chromium in the products of the r

2 Answers 5 Views

How does the acidified permanganate solution react with iron (II) ions Write the ionic equations for the reactions.

2 Answers 4 Views

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron (II) ions (ii) `SO_(2)` and (iii)

2 Answers 5 Views

Oxygen is prepared by catalytic decomposition of potassium chlorine `(KClO_(3))`. Decomposition of potassium, chloride gives potassium chloride (KCl)

2 Answers 4 Views

When sulphur dioxide gas is passed throught acidified potassium dichromate solution, the colour of the solution changes from:

2 Answers 4 Views

In the form of dichromate, Cr(VI) is a strong oxidising agent in acidic medium but Mo(VI) in `Mo0_(3)` and W(VI) in `W0_(3)` are not because

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Potassium dichromate is a strong oxidising agent. In acidic solution, its oxidising action may be represented as :
`Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-)rarr2Cr^(3+)+7H_(2)O(E^(@)=1.33V)`
Ionic equations :
i) Reaction of `K_(2)Cr_(2)O_(7)` with I
`Cr_(2)O_(7)^(2-)+14H^(+)+6I^(-) rarr 2Cr^(3+)+3I_(2)+7H_(2)O`
ii) Reaction of `K_(2)Cr_(2)O_(7)" with "Fe^(2+)` (aq)
`Cr_(2)O_(7)^(2-)+14H^(+)+6Fe^(2+)rarr 2Cr^(3+)+6Fe^(3+)+7H_(2)O`
iii) Reaction of `K_(2)Cr_(2)O_(7)` with `H_(2)S`
`Cr_(2)O_(7)^(2-)+8H^(+)+3H_(2)S rarr 2Cr^(+3)+3S+7H_(2)O`