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Question

Write the balanced equations in the manufacture of K2Cr2O7 from Chromite Ore.

Solution
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The balanced equations in the manufacture of K2Cr2O7 from chromite ore are as given below.
Step I : roasting- conversion of chromite ore into sodium chromate
4FeOCr2O3+8Na2CO3+7O22Fe2O3+8Na2CrO4+8CO2
Step II : Conversion of sodium chromate into sodium dichromate
2Na2CrO4+H2SO4Na2Cr2O7+Na2SO4+H2O
Step III : Conversion of sodium dichromate into potassium dichromate
Na2Cr2O7+2KClK2Cr2O7+2NaCl

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Similar Questions
Q1
Write the balanced equations in the manufacture of K2Cr2O7 from Chromite Ore.
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Q2
Explain the preparation of K2Cr2O7 from chromite ore and write the chemical equations involved?
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Q3
Indicate the steps in the preparation of K2Cr2O7 from chromite ore.
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Q4
Write the equations involved in the preparation of potassium dichromate from chromite ore.
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Q5

Indicate the steps in the preparation of:

(i) K2Cr2O7 from chromite ore.

(ii) KMnO4 from pyrolusite ore.

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