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Transition Elements F Block Elements Q A | Chemistry ...

Transition Elements F Block Elements Q A | Chemistry ...

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 · When chromite ore is fused with sodium carbonate in free excess of air and the product is dissolved in water, a yellow solution of compound (A) is obtained. On acidifying the yellow solution with sulphuric acid, compound (B) is crystallised out. When compound (B) is treated with KC1, orange crystals of compound (C) crystallise out. Identify (A), (B) and (C) and write the reactions involved ...

When a chromite ore (A) is fused with sodium carbonate in ...

When a chromite ore (A) is fused with sodium carbonate in ...

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 · When a chromite ore (A) is fused with sodium carbonate in free excess of air and the product is dissolved in water, a yellow solution of compound (B) is obtained. After treatment of this yellow solution with sulphuric acid, compound (C) can be crystallised from the solution. When compound (C) is treated with KCl, orange crystals of compound (D ...

37. (a) When a chromite ore (A) is fused with an aqueous ...

37. (a) When a chromite ore (A) is fused with an aqueous ...

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Click here👆to get an answer to your question ️ 37. (a) When a chromite ore (A) is fused with an aqueous solution of sodium carbonate in free excess of air, a yellow solution of compound (B) is obtained. This solution is filtered and acidified with sulphuric acid to form compound (C). Compound (C) on treatment with solution of KCl gives orange crystals of compound (D).

)2507,212)1D U2 1D 2 0(/71'7+(63,12'/ '(20326,7,212 ...

)2507,212)1D U2 1D 2 0(/71'7+(63,12'/ '(20326,7,212 ...

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The chromite ore and sodium carbonate powder were mixed in a stoichiometric ratio defined in reaction (1). For TGA experiments, pellets were prepared with 2 g powder mixture after pressing, each pellet was placed inside an alumina crucible, which was then hanged inside a silica reaction tube and connected to microbalance. The silica tube was used to maintain a chosen atmosphere inside the ...

chromite reaction sodium carbonate

chromite reaction sodium carbonate

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Using Peroxide Fusions for the ICPOES Analysis . In a clean zirconium crucible, of finely ground sample measuring less than 100µm was combined with of Sodium peroxide (Na 2 O 2) and of Sodium Carbonate (Na 2 CO 3).The zirconium crucible was then placed on the Claisse ® Peroxide™ Fluxer, fused at 560°C temperature for a period of minutes, and then finally cooled by the ...

Chromite ore on fusion with sodium carbonate gives ...

Chromite ore on fusion with sodium carbonate gives ...

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 · Chromite ore on fusion with sodium carbonate gives Ask for details ; Follow Report by Vanshikasinghi9288 Log in to add a comment

When a chromite ore (A) is fused with sodium carbonate in ...

When a chromite ore (A) is fused with sodium carbonate in ...

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 · Fusion of chromite ore with sodium carbonate in excess of air gives a compound (X) (yellow solution) X when treated with sulphuric acid gives: . + + 1:40 (a) When a chromite ore (A) is fused with an aqueous solution of sodium carbonate in free excess of air, a yellow solution of compound (B) is obtained. This solution is filtered and acidified with sulphuric acid to form ...

Fusion of chromite ore with sodium carbonate in excess of ...

Fusion of chromite ore with sodium carbonate in excess of ...

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Fusion of chromite ore with sodium carbonate in excess of air gives a compound (X) (yellow solution) X when treated with sulphuric acid gives: Apne doubts clear karein ab Whatsapp par bhi. Try it now.

The sodaash roasting of chromite ore processing residue ...

The sodaash roasting of chromite ore processing residue ...

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Request PDF | The sodaash roasting of chromite ore processing residue for the reclamation of chromium | Sodium chromate is produced via the sodaash roasting of chromite ore with sodium carbonate ...

Alkali fusion using sodium carbonate for extraction of ...

Alkali fusion using sodium carbonate for extraction of ...

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 · et al. Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR alyst. Sci Rep 9, 12316 (2019). https://doi ...

[SOLVED] When FeCr2O4 is fused with Sodium Carbonate in ...

[SOLVED] When FeCr2O4 is fused with Sodium Carbonate in ...

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F eCr2O4 from Chromite ore is fused with Sodium Carbonate in the presence of air/oxygen to give Sodium Chromate, Iron (III) Oxide and CO2. In the above equation, if we add water to the products, Sodium Chromate gets completely ionized while Iron (III) Oxide is insoluble. The yellow solution of sodium chromate is filtered and acidified with acid ...

When chromite ore a is fusion with sodium carbonate gives ...

When chromite ore a is fusion with sodium carbonate gives ...

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 · When chromite ore a is fusion with sodium carbonate gives? Ask for details ; Follow Report by Smithvanessa5805 Log in to add a comment

Solved: World production of chromite (FeCr2O4), the main ...

Solved: World production of chromite (FeCr2O4), the main ...

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Chemistry: The Molecular Nature of Matter and Change (5th Edition) Edit edition Solutions for Chapter 22 Problem 81P: World production of chromite (FeCr2O4), the main ore of chromium, was ×107 metric tons in 2003. To isolate chromium, a mixture of chromite and sodium carbonate is heated in air to form sodium chromate, iron(III) oxide, and carbon dioxide.

(PDF) Thermal characteristics of ferronickel slag on ...

(PDF) Thermal characteristics of ferronickel slag on ...

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 · In this research, the ferronickel slag is first given alkaline fusion to create microcracks and to bind silica on the slag by mixing it with sodium carbonate and roast them at 1000°C and hold it ...

2nd PUC Chemistry Question Bank Chapter 8 The d and f ...

2nd PUC Chemistry Question Bank Chapter 8 The d and f ...

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 · Step – 1: Potassium dichromate is prepared by fusion of chromite ore [FeOCr 2 O 3 l with sodium carbonate with excess of air. 4 2 O 3 + 8Na 2 CO 3 + 7O 2 → 2Fe 2 O 3 + 8Na 2 CrO 4 + 8CO 2. Step – 2: The yellow solution of sodium chromate is filtered and acidified with sulphuric acid. Orange solution of sodium dichromate is obtained.

The fusion of chromite ore (FeCr2O4) with Na2CO3 in air ...

The fusion of chromite ore (FeCr2O4) with Na2CO3 in air ...

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Click here👆to get an answer to your question ️ The fusion of chromite ore (FeCr2O4) with Na2CO3 in air gives a yellow solution upon addition of water. Subsequent treatment with H2SO4 produces an orange solution. The yellow and orange colours, respectively, are due to the formation of:

ON THE COMPOSITION OF SOME INDIAN CHROMITES*

ON THE COMPOSITION OF SOME INDIAN CHROMITES*

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(1) Fuse gm. chromite with 5 gm. sodium carbonate, completing the fusion by the supply of oxygen on the melt. Extract with water, add a few drops of alcohol and filter. Wash with per cent sodium carbonate solution. (2) Filtrate contains sodium chromate, sodium aluminate and silie. Add

Common Problems with Ag, As, S, Ba, Pb and Cr

Common Problems with Ag, As, S, Ba, Pb and Cr

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The most common approach is to perform a fusion. Fusions that have been used include but are not limited to potassium and sodium bisulfate, carbonate (sodium or potassium), sodium peroxide, NaOH / KNO 3, and NaOH / Na 2 O 2. In addition, the fusion will not be complete unless the chrome is finely divided and mixed with the flux.

Fusion of chromite ore with sodium carbonate in excess of ...

Fusion of chromite ore with sodium carbonate in excess of ...

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(a) When a chromite ore (A) is fused with an aqueous solution of sodium carbonate in free excess of air, a yellow solution of compound (B) is obtained. This solution is filtered and acidified with sulphuric acid to form compound (C). Compound (C) on treatment with solution of KCl gives orange crystals of compound (D). Write the chemical formulae of compounds A to D.
(b) Describe the cause ...

Describe the Preparation of Potassium ...

Describe the Preparation of Potassium ...

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Potassium dichromate is prepared from chromate, which in turn is obtained by the fusion of chromite ore (FeCr 2 O 3) with sodium or potassium carbonate in free excess of air. The reaction with sodium carbonate occurs as follows: `4FeCr_2O_4 + 8Na_2CO_3 + 7O_2 > 8Na_2CrO_4+2Fe_2O_3+8CO_2`

Effect of mechanical activation on alkali leaching of ...

Effect of mechanical activation on alkali leaching of ...

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 · The production of chromate from chromite ore usually suffers from low extraction ratio and high environmental pollution. Traditionally, the chromite ore is processed by roasting with sodium carbonate at 1 200 in a rotary kiln with the addition of limestone and dolomite, yielding only 75% of chromium extraction[2]. Further, the hazardous ...

(Solved)

(Solved)

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 · The chromite ore is fused with sodium or potassium carbonate in free access of air. 4FeCr2O4 + 8Na2CO3 + 7O2 > 8Na2CrO4 + 2FeO3 + 8CO2 The yellow solution of sodium chromate is filtered and acidified with sulfuric acid to give a solution from which orange sodium dichromate, Na2Cr2O7 2H2O can be crystallized. 2Na2CrO4 + 2H+ > Na2Cr2O7 + 2Na + H2O Sodium .

How is Potassium Dichromate Prepared from a Sample of ...

How is Potassium Dichromate Prepared from a Sample of ...

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Preparation of potassium dichromate from chromite ore involves the following steps: (i) Conversion of chromite ore to sodium chromate: It is achieved by roasting finely powdered chromite ore with sodium carbonate and quick lime in excess of air. [ce{underset{text{Chromite ore}}{4FeCr2O4} + underset{text{Sodium carbonate}}{8Na2CO3} + 7O2 >[Cao + air]underset{text{Ferric .

USA

USA

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A method for recovering chromium values from chromite ore which initially involves pelleting a mixture of chromite ore and soda ash, preferably without the inclusion of recycled leached chromite ore residue or other refractory diluent, employing water, or preferably an electrolyte such as an aqueous solution of sodium hydroxide, potassium hydroxide, sodium aluminate, sodium silie, sodium ...