Home
Class 12
CHEMISTRY
Describe the manufacture of potassium di...

Describe the manufacture of potassium dichromate from chromite ore.

Text Solution

Verified by Experts

(i) Preparation of `K_2Cr_2O` from chromite ore
(a) Potassium dichromate is obtained by the fusion of chromite ore `(FeCr_2O_4)` with sodium (or potassium) carbonate in the presence of excess of air.
`4FeCr_2O_4+8Na_2CO_3+7O_2tounderset(("yellow solution"))(8Na_2CrO_4+2Fe_2O_3+8CO_2)`
(b) The solutio is filtered and treated with sulphuric acid
`2Na_2CrO_4+H_2SO_4toNa_2Cr_2O_7+Na_2SO_4+H_2O`
(c) Now sodium dichromate is treated with potassium chloride. As a result potassium dichromate is produced.
`Na_2Cr_2O_7+2KCl tounderset("Potassium dichromate crystals")(K_2Cr_2O_7+2NaCl)`
Promotional Banner

Topper's Solved these Questions

  • EXAM QUESTION PAPER JULY WITH ANSWER (2015)

    SUBHASH PUBLICATION|Exercise PART D|12 Videos

  • EXAM QUESTION PAPER JULY WITH ANSWER (2015)

    SUBHASH PUBLICATION|Exercise PART E|21 Videos

  • EXAM QUESTION PAPER JULY WITH ANSWER (2015)

    SUBHASH PUBLICATION|Exercise PART B|11 Videos

  • ELECTROCHEMISTRY

    SUBHASH PUBLICATION|Exercise Problem Section|25 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    SUBHASH PUBLICATION|Exercise Questions|38 Videos

Similar Questions

Explore conceptually related problems

Write the balanced equations in the manufacture of potassium dichromate from chromite ore.

Write the balanced equations in the manufacture of potassium dichromate from chromite ore.

Write the balanced chemical equation involved in the manufacture of potassium- dichromate from chromite ore.

Explain the manufacture of Potassium dichromate from chromite ore.

Write the equations involved in the preparation of potassium dichromate from chromite ore.

Write the chemical reactions in the preparation of potassium dichromate from chromite ore.

Write the balanced equations involved in the preparation of potassium dichromate from chromite ore.

How is potassium dichromate prepared from chromite are ?

Describe the preparation of potassium permanganate from pyrolusite ore. Write balanced chemical equation for one reaction to show oxidizing nature of potassium permanganate.