chromite ore on fusion with sodium carbonate gives

  • Fusion of chromite ore with sodium carbonate in excess of

    · Fusion of chromite ore with sodium carbonate in excess of air gives a compound (X) (yellow solution) X when treated with sulphuric acid gives:The fusion of chromite ore (F e C r 2 O 4 ) with N a 2 C O 3 in air gives a yellow solution upon addition of water Subsequent treatment with H 2 S O 4 produces an orange solution The yellow and orange colours, respectively, are due to the formation of: A N a 2 C r O 4 and N a 2 C r 2 O 7 B C r (O H) 3 and N a 2 C r 2 O 7 C C r 2 (C O 3 ) 3 and F e 2 (S O 4 ) 3 D C r (O H) 3 and N a 2 C rThe fusion of chromite ore (FeCr2O4) with Na2CO3 in air· (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 <br> (b) Describe theFusion of chromite ore with sodium carbonate in excess of

  • Fusion of chromite ore with sodium carbonate in excess of

    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· 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) crystallise out Identify A to D and also explainWhen a chromite ore (A) is fused with sodium carbonate in· When chromite ore a is fusion with sodium carbonate gives? Ask for details ; Follow Report by Smithvanessa5805 03012020 Log in to add a commentWhen chromite ore a is fusion with sodium carbonate gives

  • Fusion of chromite ore with sodium carbonate in excess of

    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· Fusion of chromite ore with sodium carbonate in excess of air gives a compound (X) (yellow solution) X when treated with sulphuric acid gives: 64k+ 371k+ 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 formWhen a chromite ore (A) is fused with sodium carbonate inGet answer: When a chromate ore (A) is fused with sodium carbonate in free excess of air and the product is dissolvedin 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 treatedwith KCl, orange crystals of compound (D) crystallise outWhen a chromate ore (A) is fused with sodium carbonate in

  • How is K2Cr2O7 prepared?

    Potassium dichromate (K2Cr2O7) is prepared from chromite ore FeCr2O4 The chromite ore is fused with sodium or potassium carbonate in free access of air The yellow solution of sodium chromate is filtered and acidified with sulfuric acid to give a solution from which orange sodium dichromate ,· When chromite ore FeCr 2 O 4 is fused with NaOH in presence of air, a yellow coloured compound (A) is obtained which on acidification with dilute sulphuric acid gives a compound (B) Compound (B) on reaction with KCI forms a orange coloured crystalline compound (C) (i) Write the formulae of the compounds (A), (B) and (C)When chromite ore FeCr2O4 is fused with NaOH in presencechromate obtained by the fusion of chromite ore with sodium carbonate in free access of air B pyrolusite which is fused with potassium hydroxide in the presence of air C iron pyrites by the fusion with potassium carbonate in presence of moisture D none of these Medium Answer The potassium chromate can be prepared by chromate ore F e C r 2 O 4 The various reactions given are: (i)4 FPotassium dichromate is prepared from:

  • USA Method for recovering chromium values from

    sodium ore chromite ore pellet Prior art date Legal status (The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed) Expired Lifetime Application number Inventor C Bruen W Low E Smalley Current Assignee (The listed assignees may be inaccurate Google has not· 35 Chromite ore on fusion with sodium carbonate gives (a) Na CrO and Fe O 2 4 2 3 (b) Na Cr O and Fe O 2 2 7 2 3 (c) Cr CO and Fe OH 2 3 3 3 (d) 2 4 2 3 3 Na CrO and Fe CO 36 The ligand(s) that is (are) fluxional in 5 1 C H C H Fe CO 5 5 5 5 2PAPER : CSIRUGCNET/JRF June 2014 Career EndeavourPotassium 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: `4FeCr2O4 + 8Na2CO3 + 7O2 > 8Na2CrO4+2Fe2O3+8CO2`Describe the Preparation of Potassium Dichromate from Iron

  • Chromium Wikipedia

    The chromite ore is heated with a mixture of calcium carbonate and sodium carbonate in the presence of air The chromium is oxidized to the hexavalent form, while the iron forms the stable Fe 2 O 3 The subsequent leaching at higher elevated temperatures dissolves· The sodium carbonate roasting of chromite ores is a commercial process of chromium chemical production reported by Several researchers have used sodium carbonate with chromite ore in the sodaash roasting reaction Temperatures used are above 1073 K in air The decomposition of sodium carbonate has resulted sodium oxide to react with chromium ion (Cr 3+) under an oxidizingProcessing of Chromite Overburden by Soda Roasting toThe chromite ore is heated with a mixture of calcium carbonate and sodium carbonate in the presence of air The chromium is oxidized to the hexavalent form, while the iron forms the stable Fe 2 O 3 The subsequent leaching at higher elevated temperatures dissolves the chromates and leaves the insoluble iron oxide The chromate is converted by sulfuric acid into the dichromate 4 FeCr 2 O 4 + 8chromite reaction sodium carbonate hotelshrihaan

  • Roasting Between Chromite Ore And Sodium Carbonate

    Home Roasting Between Chromite Ore And Sodium Carbonate PEW series Jaw crusher features big crushing ratio, reliable operation, easy maintenance and low operating cost It is the PEW Jaw Crusher + By analyzing customers’ requirements and absorbing the worldclass advanced technology, GM developed the HJ series jaw HJ Series Jaw Crusher + HPT cone crusher has the same structure· 35 Chromite ore on fusion with sodium carbonate gives (a) Na CrO and Fe O 2 4 2 3 (b) Na Cr O and Fe O 2 2 7 2 3 (c) Cr CO and Fe OH 2 3 3 3 (d) 2 4 2 3 3 Na CrO and Fe CO 36 The ligand(s) that is (are) fluxional in 5 1 C H C H Fe CO 5 5 5 5 2PAPER : CSIRUGCNET/JRF June 2014 Career EndeavourTherefore, chemical analyses of the chromite ore, plus its final and waste products is very important In metal analysis, Sodium peroxide fusion provides a safe, fast and efficient alternative for complete dissolution of samples Experimental Framework Sample Preparation The sodium peroxide fusion method can be carried out both manually or with automatic systems Here, the automatedUsing Peroxide Fusions for the ICPOES Analysis of

  • Chromium Wikipedia

    The chromite ore is heated with a mixture of calcium carbonate and sodium carbonate in the presence of air The chromium is oxidized to the hexavalent form, while the iron forms the stable Fe 2 O 3 The subsequent leaching at higher elevated temperatures dissolvesPotassium 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: `4FeCr2O4 + 8Na2CO3 + 7O2 > 8Na2CrO4+2Fe2O3+8CO2`Describe the Preparation of Potassium Dichromate from IronOptimum composition of the fusion mixture was found to be 10 g sodium metaphosphate and 9 g silica to 10 g sample, 15 g sodium carbonate, 30 g lithium tetraborate, 75 g nickel and 45 g sulfur to achieve complete dissolution of chromite grains The new flux mixture was evaluated by the analysis of reference material CHR‐Pt+ (which is known to contain PGM inside chromite grains) and noImproved Platinum‐Group Element Extraction by NiS Fire

  • Bottom of Pyramid Test # 32 Metallurgy

    Bottom of Pyramid Test # 32 Metallurgy Bottom of Pyramid Test # 32 Metallurgy Contact Number: / Page: Print 1 High purity copper metal is obtained by: 1 carbon reduction 2 hydrogen reduction 3 electrolytic reductionDescribe the preparation of potassium dichromate from iron chromite ore What is the effect of increasing pH on a solution of potassium dichromate?Describe the preparation of potassium dichromate from iron

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