Which of the following is NOT a chemical reaction? Select one: O a. Decomposition of the protein serum albumin Ob. Deposition of Nickelacene Ni(n-CsHs)2 on a cold-finger set-up OC Protonation of Magic Acid (FSOH SbFs) on the alkane cubane od. Precipitation of complex Prusslan Blue FeFe(CN)ls from mixing KalFe(CN)Ja and FeCla
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- Consider the reaction between dissolved Fe2+ and elemental sulfur (S0) to form hematite (Fe2O3) and sulfide a) Identify the oxidant and reductant in this reaction, determine half-reactions, and balance thereaction. b) Is this reaction thermodynamically favorable? c) Would you expect HS- to react readily with Fe2O3 (i.e. the reverse of the reaction)?Suggest a method by which Ni2+ can be precipitated homogeneously as NiS. a. Add sodium sulfste to the solution to precipitate NiSO4. Heat the nickel(II) sulfate to liberate O2 and yield pure NiS. b. The slow hydrolysis of thioacetamide can be used to generate a source of hydrogen sulfide gas, which provides the S²- to complex with the Ni2+. c. Add thiosulfuric acid to the solution to react with Ni2+ and precipitate NiS. d. Heat S8 in the presence of Ni2+, in an inert atmosphere, to produce NiS.When I was a boy, I watched Uncle Wilbur measure the iron content of runoff from his banana ranch. He acidified a 25.0-mL sample with HNO3 and treated it with excess KSCN to form a red complex. (KSCN itself is colorless.) He then diluted the solution to 100.0 mL and put it in a variablepathlength cell. For comparison, he treated a 10.0-mL reference sample of 6.80 3 1024 M Fe31 with HNO3 and KSCN and diluted it to 50.0 mL. The reference was placed in a cell with a 1.00-cm pathlength. Runoff had the same absorbance as the reference when the pathlength of the runoff cell was 2.48 cm. What was the concentration of iron in Uncle Wilbur’s runoff ?
- Bleach (sodium hypochlorite, NaOCl, a strong oxidizing agent) neutralizes and inactivates mustard gas. Bleach is also effective on organic stains because it oxidizes coloredcompounds to colorless compounds. Propose products that might be formed by thereaction of mustard gas with bleachGiven A, B, and C… [A] U(VI) as uraninite; UO2 (where Fe2+= reductant; Fe(OH)3 ferrihydrite= product): 2Fe2+ + UO22+ +3H2O + H+ ---- > 2Fe(OH)3 + U4+ +2H2O [B] U(VI) as uraninite; UO2 (where Mn2+= reductant; MnO2 pyrolusite= product): 2H2O + UO22+ + Mn2+ ---- > UO2 + B - MnO2 + 4H+ [C] U(VI) as as uraninite; UO2 (where HS-= reductant; S0= product): UO22+ + Hs- ---- > UO2 + S + H+ QUESTION: Use thermodynamic calculations [use redox potential (Eh)] to predict which of the three reductants below is most favorable at pH 3 ? (1) Fe2+ (2) Mn2+ (3) HS-(i) Tungsten hexacarbonyl can be prepared by reacting WCl6 with triethylaluminium in the presence of carbon monoxide. By-products of this reaction are aluminium trichloride and n-butane. Give the two relevant half-equations and then construct the full redox equation.(ii) Tetrarhodium dodecacarbonyl is formed upon treatment of Na+ [Rh(CO)2Cl2]- with H2O under a stream of CO. Give the two relevant half-equations and then construct the full redox equation for this reaction. Take into account that some of the CO acts as a reducing agent.
- A 0.703 g sample of a commercial detergent was red-calcined to destroy its components. organic. Treatment of the residue with hot HCl gave phosphorus in solution as H3PO4. the phosphate was precipitated as MgNH4PO4-6H2O by the addition of Mg + 2 or followed by aqueous NH3. The precipitate was filtered, washed, and converted to Mg2P2O7 by calcination at 1000 C. The residue weighed 0.432 g. Calculate the percentage of phosphorus in the sample.what wt. of limestone containing 9.57% Mg must be taken for analysis in order to precipitate of 0.551g Mg2P2O7? how many grams of Na2SO4 are required to ppte Ag2SO4 from 2.000t of AgNO3? a sample of magnetite (impure Fe3O4) weighing 0.5000g is fused with oxidizing flux and the ferric compound formed is eventually precipitated as ferric hydroxide and ignited to ferric oxide which weighs 0.4980calculate %Fe & %Fe2O3A scientist was tasked to extract Fe from an aqueous suspension that contains 106 g of Fe2O3. The following steps detail the transformation of Fe2O3 (aq) to elemental iron: I. Enough sulfur trioxide gas was bubbled to Fe2O3 aqueous suspension to completely yield ferric sulfate. II. Then, 5.00 M nitric acid was added to ferric sulfate yielding an aqueous solution of ferric nitrate. III. Excess magnesium powder was added to the aqueous solution of ferric nitrate precipitating the solid iron ----- a. Write the balanced chemical reaction and the type of chemical reaction for [I], [II], [III]. Do not forget to indicate the states of the reactants and products (s, l, g).(CHOICES: COMBINATION, SINGLE DISPLACEMENT, DOUBLE DISPLACEMENT) b. What is the final mass of iron? Express final answers in 3 significant figures. c. High-concentration HCl is supposed to be added at the last part of the procedure. Briefly state its purpose.
- Caustic potash that has been exposed to air is found on analysis to contain 90.00% KOH, 2.38% K2CO3 and 7.62% H2O. What weight of residue will be obtained if 1.00 g of this sample is added to 46.00 mL of 1.00 N HCl and the resulting solution, after neutralization with 1.070N KOH is evaporated to dryness?if we use KMnO4 and H3Po4 and MnSO4 for tritation of fecl3 and calculation of. Fe2+ what suitable ratio for tritationQuickly plezz!! The levigating agent role in Suppositories manufacturing ??