3. A 100.0 mL sample of ground water was treated to convert the iron present to Fe2+. Addition of 25.00 mL of 0.002412 M K2Cr2O7 resulted in the reaction below. 6Fe2+ + Cr2O72 - + 14H+ → 6Fe3+ + 2Cr3+ + 7H2O The excess K2Cr2O7 was back-titrated with 8.12 mL of 0.00859 M Fe2+ solution. What is the concentration of Fe in the sample in parts per million?

Q: 1. Balance the following oxidation-reduction reaction using the half reaction method under acidic…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: A 20.00 mL solution of 0.1200 M TI³+ is titrated with 0.2000 M Fe²+. TI³+ + 2e- TI* Eº = +1.280 V…

A: Given: Volume of Tl3+ = 20.00 mL Concentration of Tl3+ = 0.1200 M Concentration of Fe2+ = 0.200 M To…

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A: The answer to the following question is-

Q: ase balance the ionic equation below & 20. í Cu(NH3)4(H2O)2]2* () + _H2SO4 (2) → _CUSO4 ee) +…

A:

Q: A 110.0-mL sample of spring water was treated to convert any iron present to Fe2+. Addition of…

A: Answer is 172.4 ppm

Q: A pure oxide of iron weighing 1.000 g is fused with K2S2O7 and the fused material dissolved in acid.…

A:

Q: A 1.000-g sample containing KHC204, H2C204, and impurities required 38.22 mL of 0.1000 M NaOH for…

A: The answer is 1.582 m moles of KHC2O4

Q: A 0.3674 g powdered milk sample was analyzed for calcium by igniting in a crucible at 1000°C, the…

A: Analysis of sampleMass of sample = 0.3674 gTemperature = 1000oCVolume of EDTA required = 15.62…

Q: 1) Balance the following reaction for acidic and then basic conditions. VO2+ + Zn --> VO2+ + Zn2+

A:

Q: a. A 0.3108-g sample of primary-standard-grade Na2 C2O4 was dissolved in H2SO4 and titrated with…

A:

Q: The Tl in a 9.76-g sample of rodenticide was oxidized to the trivalent state and treated with an…

A: a) Direct titration In direct titration , a titrant of known concentration and volume is added to a…

Q: Formation of a red color upon addition of KSCN confirms the presence of which metal: aluminum,…

A: Formation of a red color upon addition of KSCN confirms the presence of iron metal.

Q: balance the reaction in acidic soln VO₂+ + Zn ➖➖➖➖➖ > VO+² + Zn+²

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A:

Q: The oxidation of 25 mL of a solution containing Fe²+ requires 3.0 × 10¹ mL of 0.0315 M K₂Cr₂O7 in…

A: For balancing the reaction, look at the reaction closely, there are 2 Cr atom is present at the left…

Q: You are to make 300mL of 20mM EDTA buffer (C10H16N2O8) solution from powder. How much EDTA powder…

A: We need to make 300mL of 20mM EDTA buffer (C10H16N2O8) solution   Number of moles of solution…

Q: constant

A: The first step is to calculate the standard potential for the overall reaction. It can be done by…

Q: A 100.0-mL sample of spring water was treated to convert any iron present to Fe. Addition of…

A: Using back titration data we can calculate the concentration of K2Cr2O7 from that we can figure out…

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A:

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Q: 1. Sodium oxalate crystals (0.1234 g, MM=134) required 15.67 ml of KMNO, solution to titrate. Find…

A: the solution is as follows:

Q: This EDTA solution is used to analyze a piece of 0.0630 g of metal alloy containing Sn and Cu that…

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Q: Use the following data to determine if Cr²⁺(aq) can be pre-pared by the reaction of Cr(s) with…

A: The preparation of Cr?- (aq) from Cr(s) and Cr3+ (aq) can be done as given below; (1) Cr3+ (aq) + e-…

Q: 1. Balance the following reaction in acidic solution: H3PO₂ + Cr₂O7²- → H3PO4 + Cr³+ 2- 2. Balance…

A:

Q: Potassium dichromate is often used to standardize reducing agents like Fe2** Cr207 + 6Fe2+ + 14 H* →…

A: it is an example of redox titration where potassium dichromate is standardized using reducing agents…

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A: The solubility equilibrium for the slightly soluble salt Ce(IO3)4:Now,

Q: Chromel is an alloy composed of nickel, iron, and chromium. A 0.6392-g sample was dissolved and…

A:

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

A: It is an application of redox titration where a redox reaction occur between KMnO4 as titrant and…

Q: The Cl– content of a solution was analyzed via an EDTA titration. 2.00 g of AgNO3 was added to 25.00…

A: It is an example of back titration. In such type of titration, two titrants are present, out of…

Q: Balance the following Tedox reactions using the ton- electro Method. a.) cl03+cl' C12+CIO, ( in…

A: The objective of the question is to balance the given equation in ion electron method.

Q: 0.5 g sample of an alloy containing 30% (m/m) iron (MM 55.84 g/mol) is dissolved in acid and diluted…

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Q: Ealance the jon Elecbon method. OFe+ -2 Crz Oq> Fets crt3 (Acidic Medium Cr+3

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Q: The equilibrium constant for the following reaction is 1.0 x 10²3. Cr³+ (aq) + H₂EDTA² (aq) ⇒…

A: The equilibrium constant for the complexation reaction of Cr3+ ion is given to be 1.0 × 1023.…

Q: A 1.000-g sample containing  bromide was dissolved in sufficient water to give 100.0 mL.  A 50.00 mL…

A: The answer is attached below-: