A solution of iron(II) sulfate was prepared by dissolving 10.00 g of FeSO4•7H2O (FW = 277.9) in water and diluting up to a total volume of 250 mL. The solution was left to stand, exposed to air, and some of the iron(II) ions became oxidized to ron(III) ions. A 25.0 mL sample of this partially oxidized solution required 23.70 mL of 0.0100 M potassium dichromate K2Cr2O7 solution for complete reaction in the presence of dilute sulfuric acid. Calculate the percentage of iron(II) ions that had been oxidized by the air.

Q: The quantity of antimony in a sample can be determined by an oxidation-reduction titration with an…

A: The objective of the question is to determine the mass and percentage of antimony in the sample.…

Q: The fertilizer ammonium sulfate, (NH4)2SO4, is prepared by the rxn of ammonia with sulfuric acid.…

A:

Q: e the following redox reaction. What are the coeffici HNO 3(aq) → Zn 2+ (aq) + NO(g) O=4, NO = 2…

A: Reaction,  Zn + HNO3  ----> Zn2+ + NO USing oxidation number method  3Zn + 2HNO3   +6H+  ---->…

Q: In a reactin between copper metal and aqueous iron(III) chloride, Fe3+(aq) is reduced to Fe2+(aq),…

A: The given information says that reaction is a redox reaction. The overall balanced equation for…

Q: alculate the amount of antimony in the sample and its percentage in the ore. mass of antimony:…

A:

Q: (References) The blood alcohol CH; OH level can be determined by titrating a sample of blood plasma…

A: The given unbalanced equation is, CrO72-(aq)+C2H5OH(aq)→Cr3+(aq)+CO2(g) First we need to balance…

Q: Complete and balance the following redox reaction in basic solution. Be sure to include the proper…

A: The given redox reaction is as follows: A redox reaction is balanced by balancing the mass and…

Q: Balance the following reactions in acidic medium add H+ or OH - depending on what medium the…

A: The balanced half-cell reactions are: Oxidation half-cell:C2O42- (aq)   →2 CO2 (g)  + 2e-×6Reduction…

Q: What type of reaction is this? 2K(s) + Cl₂(g) → 2KCl(s)

A: A reaction in which two or more substances chemically combine together and results in the formation…

Q: 60. When tin comes in contact with the oxygen in the air, tin(IV) oxide, SnO2, is formed. Sn(s) +…

A: (a)

Q: Please help

A: If you have any help please let me know in comment box .

Q: A student investigated the stoichiometry of the reaction of zinc (Zn) with HCl solution and reported…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Water can decompose into H2H2 and O2O2 via electrolysis. How many moles of H2H2 could theoretically…

A: 2.24 moles of H2H2 could theoretically be obtained from 80.6 g water.

Q: The quantity of antimony in a sample can be determined by an oxidation-reduction titration with an…

A: Unbalanced reaction : BrO3-(aq) + Sb3+(aq) → Br-(aq) + Sb5+(aq)

Q: Aluminum is produced commercially by the electrolysis of Al2O3 in the presence of a molten salt. If…

A:

Q: Decide whether each chemical reaction in the table below is an oxidation-reduction ("redox")…

A:

Q: A student conducts a redox titration to determine the grams of iron in an iron-containing sample.…

A:

Q: The hydroperoxide ion, HO2–(aq), reacts with permanganate ion, MnO4–(aq) to produce MnO2(s) and…

A: The reactants given are HO2- and MnO4- ions. And the products given are MnO2 and O2. Hence the…

Q: For the reaction KClO⟶KCl+12O2 assign oxidation numbers to each element on each side of the…

A: Reactant side: KClO  Oxidation number on K = +1 Oxidation number on O = -2

Q: A(3) NH, + AIO, (aq) O NO, (ag) +H,0() + 2 Al(s) + OH (ag)- NH,)+2 A10, (a O 2 NO, (ag) +H,0(1) + 2…

A: Option A is the right answer.

Q: The quantity of antimony in a sample can be determined by an oxidation-reduction titration with an…

A: Given  Mass of sample = 6.05 g Volume of KBrO3 = 23.7 ml Molarity of KBrO3 = 0.145 M Standard values…

Q: redox reaction? Oyes O no 2Fe(s) + 3NICI, (aq) 2FEC1, (ag) + 3Ni(s) reducing agent: oxidizing agent:…

A: Reducing agent is a substance that tends to bring about reduction by being oxidized and losing…

Q: Payalben

A: Given: masssample=7.91g;V=33.3mL;[BrO3−​]=0.135M;MSb​=121.76g/molStep 1: Write the…

Q: Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C…

A: Given :  A , B and C all are oxidising agents and reduces to A- , B- and C- respectively.  In…

Q: The Fe2+ (55.845 g/mol) content of a 2.433 g steel sample dissolved in 50.00 mL of an acidic…

A:

Q: Balance the following redox reaction in acidic solution. CI (aq)+103(aq) → Cl₂(g)+1₂(s)

A: In the redox reaction, we balance the half-oxidation and reduction reactions. Then we add that…

Q: The fertilizer ammonium sulfate, (NH4)2SO4, is prepared by the rxn of ammonia with sulfuric acid.…

A: The balanced chemical equation of a reaction has equal number of atoms and balanced charges on…

Q: The following reaction occurs when two aqueous solutions are mixed: Cr(NO3)3(aq) + 3NaOH(aq)   →…

A: Ionic Equation :- In such chemical equation, we write all ions that reacted in the reaction. Net -…

Q: Consider the following reaction used in Breathalyser tests: 16H⁺(aq) + 2Cr₂O₇²⁻(aq) + C₂H₅OH(ℓ) →…

A:

Q: A 50.0-mL aliquot of unknown Cu(II) solution was exhaustively electrolyzed to deposit all copper on…

A: Faraday's law of electrolysis In electrolytic cell, the weight of substance that deposited on…

Q: For the following, balance the equations and identify the atoms oxidized and reduced.   a)  Al (s)…

A: If oxidation number of  an atom increases then the atom is oxidised and if the oxidation number of…

Q: A copper penny dropped into a solution of nitric acid produces a mixture of nitrogen oxides. The…

A: a) The given reaction is as follows, The half-cell reaction at cathode is as follows, The…

Q: Complete and balance the following redox equations using the smallest whole-number coefficients. The…

A: