For Redox Analysis of Iron... ~0.02 M of potassium dichromate is prepared as titrant for dried unknown. ~.3 g of sample, 50ml of 6M HCl, 20mL SnCl2, 10 mL of saturated HgCl2 solution, 60 mL of 3M H2SO4, 15mL of concentrated H3PO4, 100mL DI water. HCl (+ heat in fumehood until samples dissolves), SnCl2 (added with pipet until solution changes from yellow to colorless/light green with 3 drops in excess), HgCl2 (after cooling), H2SO4, H3PO4, DI Water, is added to the sample solution with 8 drops of diphenylamine sulfonate indicator then titrated with the potassium dichromate to a violet blue endpoint. 1. What is the purpose of the phosphoric acid in this experiment? Please be specific. 2. How does the Diphenylamine sulfonate indicator work? What chemical reaction causes the color change? How is an indicator chosen in a redox reaction?

Q: The table below shows a summary of precipitation indicator methods used in titrimetric analysis.…

A: Precipitation titration is a kind of titration in which precipitate is formed during the titration…

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A: Kindly get the answer given below.

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A: 1. CaCO3 + O2 -------> CaO + O2 2. Zn + HCl ------>

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A: Given, Volume of air sample = 4.79 L Volume of Na2S2O3 = 7.17 mL Concentration of Na2S2O3 = 0.00329…

Q: 11. A 0.485 g sample containing chloride was titrated with 36.8 mL of 0.1060 M AgNO3 stock solution.…

A:

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A:

Q: R ter shift We will begin the anion analysis with a known solution containing I-, Cl-, and SO42-.…

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Q: SOLVE mathematically, then choose the correct answers: Calculate the pH of solution made by…

A:

Q: A 25.00 ml. solution of 0.08570 M Nal is titrated with 0.05020 M AGNO,. Calculate pAg* following the…

A:

Q: If 1.000 ml. of a solution of KMn04 is equiva- lent to 0.1000 millimole of NaCHO2 (sodium formate)…

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Q: calculate the following: Vos = 20.20 ml (Cro.') = 0.1350 M (Ag') = 0.202 M Kıp = 1.17x 101 M a)…

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Q: What concentration of CIO, results when 979 mL of 0.289 M AgCIO, is mixed with 651 mL of 0.273 M…

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Q: 0.4515-g sample of solid containing a mixture of only CuSO4 SH:O and Hg(NO:) equired 29.52 mL of…

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Q: [References) Calculate the pH at the halfway point and at the equivalence point for each of the…

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Q: What is the equation for I- titrated with the IO3 standard solution.

A:

Q: A solution is made by mixing 500.0 mL of 0.03593 M Na, HASO, with 500.0 mL of 0.03135 M NAOH.…

A:

Q: 1. A 1.000 g sample.containing Na,C,0, (MM=134 mg/mmol) is titrated with 40.00 mL of 0.0200 M KMNO,…

A: Given,

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A: The given problem is titration of NaOH Vs H3PO4. Given Molarity Of NaOH=0.238mol/L

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Q: Compare the solubility of lead chromate in each of the following aqueous solutions: Clear All 0.10 M…

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A:

Q: Suitable treatment of a 2.566 g soil sample converts all arsenic to AsO43-. 50.00 mL of 0.082 M Ag+…

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A: Solubility product is used in predicting whether a precipitate will form under specified conditions.

Q: The sulfate in 186.5 mg sample was precipitated as BaSO, by addition of 32.00 mL of 0.0340 M BaCl,.…

A: The required answer is as follows:

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Q: Balance the reaction in acid and base medium using half reaction method 1. Cu + HNO3 — Cu^+2 + NO

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Q: Use the data below to determine the % by mass of Fe to TWO decimal places, if a 0.021 M KMnO…

A: the correct answer is as follows:

Q: PART 1: A solution contains 0.00010 M copper(II) ions and 0.0020 M lead(II) ions. a) What minimal…

A:

Q: Calculate the M of the malonic in the sample.

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A:

Q: 2,5 ml volume has taken from an “hypothetic” solution which includes (3+) Sb and (3+) Fe and at the…

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Q: Given 100 mL of a solution that contains 0.80 mM Ag* and 0.80 mM Cu*, can the two metals be…

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Q: 9.6 ml of a standard NaOH was consumed in the titration of 5.0 mL CH3COOH sample. Calculate for the…

A: Given: 1.0 mL of NaOH is equivalent to 0.1071 g of KHP. Volume of NaOH solution required = 9.6 mL.…