(a) What is the percentage of MnO2 in a pyrolusite ore if a sample weighing 0.4000g is treated with 0.6000g of pure H2C2O4•2H2O and dilute H2SO4 and after reduction has taken place (MnO2 + H2C2O4 + 2H+ → Mn2+ + 2CO2 + 2H2O), the excess oxalic acid requires 26.26ml of 0.1000N KMnO4 for titration? (b) If pure As2O3 were used instead of oxalic acid, how many grams would be required in order for the other numerical data to remain the same?

Q: Please write a balanced formula for U(VI) (as uraninite; UO2) using Mn2+ as a reductant for U(VI)…

A:

Q: Calculate Eº, Gº, and K at 25 °C for the reaction: 2MnO4 (aq) + 4H+ (aq) + Cl₂(g) (Use: CIO3 to Cl₂…

A: The given reaction is - 4MnO4-aq  +  4H+aq  +  Cl2g   →   2Mn2+aq  +  2ClO3-aq  +  2H2O Oxidation -…

Q: Which set of elements gives each of the following alloys: (a) brass; (b) stainless steel; (c)…

A: Which set of elements gives each of the following alloys: (a) brass; (b) stainless steel; (c)…

Q: Complete and balance the following equations, and identify the oxidizing and reducing agents: MnO4…

A: Redox reaction- the reaction in which oxidation and reduction takes place simultaneously called as…

Q: A sample of slag (ore tailings) from a blast furnace was analyzed to determine the SiO2 content. A…

A:

Q: Among Fe, Cu, Al and Pb, which metal (s) can not be obtained by smelting.

A: The arrangement of metals according to their decreasing order of reactivity is termed as reactivity…

Q: 1. Balance the following reaction: Cr + O2 -> CrO3

A: Cr + O2 -> CrO3         after the balancing this equation :

Q: If the following redox reaction Cr + 3 V3+ → 3 V2+ + Cr3+ is found to occur spontaneously, identify…

A:

Q: What is the redox equation for K2Cr2O7(aq) (ACIDIC) + Co(NO3)2(aq)?

A: Redox reaction is reaction in which oxidation and reduction takes place simultaneously. This…

Q: What does the following equation represent? CaCO3 + 2H* = Ca2+ + H20 + CO2 Dissolution of magnesite…

A:

Q: What does the following equation represent? 14FE3+ + FeS2 (s) + 8H20 = 15FE2+ + 2S042 + 16H*…

A: The balanced reaction given is,

Q: Balance in oxidation state method:

A: ANSWER IS DISCUSSED BELOW

Q: A blast furnace uses Fe₂O₃ to produce 8400. t of Fe per day.(a) What mass of CO₂ is produced each…

A: a) The chemical reaction that occurs in the blast furnace to produce iron is as follows,

Q: 1. A sample of iron ore weighing 0.6428 g is dissolved in acid The iron is reduced to Fe* and…

A: Soln  M_0.6428

Q: A student synthesizing [Cu(NH3)4(H2O)]SO4crystals, rushing for time, decided to dry the crystals in…

A: We can expect a negative error with the yield. This is because the complex on heating release water…

Q: The Kf (complex formation constant) of [Ag(en)₂*] > is 5.0x107. The standard reduction potential E°…

A:

Q: A 100.0 mL sample of spring water was treated to convert any iron Fe2+. Addition of 25.00 mL of…

A:

Q: Compensate for the following redox reactions using the half reaction method?   In Acidic Solution;…

A: (Fe(CN)6)3-+ N2H4→(Fe(CN)6)4-+ N2   Reactant product oxidation number Fe=+3,C=+2 N=-3…

Q: Divalent manganese reacts with oxygen according to the following chemical reaction: Mn2 +1/2 O2 (9 +…

A:

Q: 1) Balance the following in acidic solution: (a) H2O2 + Sn²+ + H2O + Sn*+ (b) PŁO2 + Hg → H* + P&+…

A: Given: Some Reactions are given To find: Balance the given Reaction in acidic medium  Solution:…

Q: Which of the following elements is most likely to be used to prepare La by the reduction of La2O3:…

A:

Q: What is the oxidation state of iron in the following compound Ka[F (CN)&J? +2 +3 +1

A: K3[Fe(CN)6]

Q: what is the role of silica in the metallurgy of copper?

A: The most important ore of copper found on the earth is the copper-pyrite ore whose chemical formula…

Q: Describe the preparation of KMn04 from pyrolusite ore (MnO4). How does the acidified permanganate…

A: The reactions in which one species is oxidized and other species is reduced are known as redox…

Q: 3. For the substitution of [Mn(OH2)oJ** to form [MnX(OH2)s]*, what experiments could you design to…

A: PLease fine the answer given below:

Q: A slag sample is known to contain all of its iron in the forms of FeO and Fe2O3. A sample of 1,000 g…

A: Redox reactions are the reaction that involves simultaneous oxidation and reduction reactions. A…

Q: What is the oxidation number of manganese in MnO2?

A: Answer: Formal charge present on an atom in a molecule is called as its oxidation number. It can be…

Q: Hard water is a problem for many residential and commercial applications. How can hard water be…

A: Several methods of water softening have emerged in an attempt to overcome the challenges posed…

Q: Using data from Appendix E, calculate the equilibrium constant for the disproportionation of the…

A: Cu+(aq) -----------------> Cu2+ (aq) + e-            E0 = -0.15v Cu+ (aq)+ e- --------------->…

Q: The pyrite (iron sulfide) roasting process is carried out following the next reaction [FeS2 (s) +…

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Q: Jsing the half-reaction method, balance the following reaction under acidic conditions: TeO,2 N204…

A: Balance the oxygen on both sides by adding H2O to one side. Balance the hydrogen on both sides by…

Q: explain the preparation of K2Cr2O7 from chromite ore.

A: The first step of this conversion involves the reaction of chromite ore (FeCr2O4) with sodium…

Q: Why does not silver evolve hydrogen on reacting with dil H2SO4

A: Silver is less reactive than hydrogen and so placed below hydrogen in the reactivity series. Metals…

Q: What is the assigned oxidation number for molybdenum in aluminum molybdate Al2(MoO4)3

A: We have to tell oxidation number for molybdenum in aluminum molybdate

Q: What happens in this reaction? 3Zn(s) + 2Cr3*(aq) 2Cr(s) + 3Zn2*(aq)

A: The species whose oxidation number increases is oxidized  The species whose oxidation number…

Q: Balance the following redox reaction in an acidic solution: a. Cr2O72-(aq) + C2H5OH(l) →Cr3+(aq) +…

A: Oxidation means loss of electrons and reduction means gain of electrons.

Q: What is the mass percent of iron in each of the following iron ores: Fe₂O₃, Fe₃O₄, FeS₂?

A: Mass percent of an element is given by, Mass % =mass of elementTotal mass(100)

Q: If the iron in a 0.1500-gram sample of iron ore is reduced and subsequently requires 15.03 ml of…

A: Given: Mass of iron ore sample = 0.15 g KMnO4 required for oxidation = 15.03 mL To find: Purity of…

Q: Balanced overall reaction for RHR: Cu2+(aq) + 2e- → Cu(s) and O2(g) + 4H+ (aq) + 4e- → 2H2O

A: Well, to balance the redox reaction we have to balance the number of electron of both the reduction…