4- Create a diagram (step-by-step flowchart) of the procedure for the "Color Absorption by a Cobalt(II) Chloride Solution". Your diagram should be clear and easy to follow by anybody who will perform the experiment.
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- Given: You weigh out exactly 0.200 g of Fe(NH4)2(SO4)2·6H2O and dissolve it in the 100.00 mL volumetric flask. You then pipette 2.00 mL of this solution into the 50.00 mL volumetric flask to prepare the stock standard tris-bipyridyl-iron(II) solution. a. Calculate the molar concentration of iron(II) in this solution in the 50.00 mL volumetric flask. (The MW of Fe(NH4)2(SO4)2·6H2O is 392.14 g/mol) (answer a given the information above)(Please give clear handwritten answer) 0.1 M HNO3 solution at 298K was electrolyzed in Hittorf cell using platinum electrodes. After electrolysis, 34.2 mg of copper was deposited in coulometer which in series with the Hittorf cell. 50 mL of HNO3 solution was withdrawn from anode compartment after electrolysis and found to have a concentration of 0.0821 M. [Atomic mass Cu = 63]. (i) Find the transference number of H + and NO3 −. (ii) If 50 mL HNO3 solution was run off from cathode compartment, what would its concentration be?A 1.000 g sample containing chlorides, iodides and inert materials was treated with dilute nitric acid followed by AgNO3. A precipitate of AgCl (143.32) and AgI (234.77) was produced and weighs 0.9238 g. On heating in a current of Cl2, the AgI is converted to AgCl, and the resulting product weighs 0.7238 g. Find the percentage of a) NaI (149.89) and b) NaCl (58.44) in the sample
- 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 ?If you have a sample of 100 mg/L of calcium, and you have two standardized EDTA solutions of 0.005 M and 0.001 M, which is more suitable to spend approximately 15.00 mL of the titrant if 25.00 mL of sample are added in the Erlenmeyer flask? How many mL of titrant will be used?) What amperage is required to plate out 0.250 mol Cr from a Cr3+ solution in a period of 8.00 h?
- What is the purpose of adding CaCO3 or NaHCO3 in the Mohr Method determination of chloride? Please answer in TEXT form so I can copy the text. Please. Thank you!!!A 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.(a) Sketch the molecular structure of EDTA. Indicate the ligands in your sketch. (b) Briefly explain how EDTA has strong affinity to heavy metal ions. (c) Do internet research regarding where EDTA is used and briefly write about your search results. (d) For the given chelating reaction, find the effective EDTA dose in M (mole/L) to reduce [Pb2+] below 10-15 M. Assume that the initial [Pb2+] is 10-4 M. EDTA + Pb2+ ↔ Pb-EDTA K = 1019.8
- What is the purpose of immersing the electrode in a saturated KCl solution? Is it proper to store the electrode in deionized water? Why or why not? Explain clearly and thoroughly.Iron (III) can be separated from other metals, such as chromium, by extraction into ether froma strong aqueous HCl solution. If 50 mL of aqueous HCl containing 0.25 g of iron(III) is treatedwith 150 mL of ether in a one-shot process, how many milligrams of iron is left in the aqueousphase? Use a value of 50 for the distribution ratio.Students occasionally observe the formation of a solid white side product, sometimes appearing as a white residue on the walls of the test tube, in the recovery and isolation of the copper metal in Reaction E ( CuSO4(aq) + Mg(s) --> Cu(s) + MgSO4(aq) ). Speculate on the identity of this white solid. (Use of online resources may be helpful.)