For each reaction, write the chemical formulae of the oxidized reactants in the space provided. Write the chemic space provided. reactants oxidized: 3P6(NO,), (ag) 2Fe(NO,), (a) 2Fe(s) + 3Pb(s) + reactants reduced: reactants oxidized: FeSo, (aq) + Mg(s) Fe(s) + MgSO, (aq) reactants reduced: reactants oxidized: Ca(s) + ZnCl, (aq) Zn(s) + CaCl, (aq) reactants reduced:
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- Fill in the following brackets: Redox reactions can also lead to greenhouse gas emissions from soils. Under very strongly reducing conditions (Eh < -0.1) the dominant GHG released from soils is likely ["carbon dioxide", or "methane", or "nitrous oxide", or "nitrous oxide and carbon dioxide"], whereas, at oxidizing conditions (Eh > +0.2) release of ["carbon dioxide", or "methane", or "nitrous oxide", or "nitrous oxide and carbon dioxide"] is more favorable.Which of the following statements accurately describes the Nernst equation shown below? Ecell=Ecello−nFRTlnQ1- Select ALL that are always TRUE for a spontaneous process. Group of answer choices ∆H > 0 and ∆S < 0 ∆Suniverse > 0 ∆G < 0 K = 1 Q < K 2-Consider the chemical reaction, 5 Fe2+(aq) + MnO4−(aq) + 8 H+(aq) ⟶ 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(l) determine if each of the following statements is True or False. 1) MnO4−(aq) is the oxidizing agent. [ Select ] ["True", "False"] 2) Fe2+(aq) gains electrons. [ Select ] ["False", "True"] 3) Mn2+(aq) is the reducing agent. [ Select ] ["True", "False"] 4) H+(aq) undergoes oxidization.
- For a redox reaction, when ?∘????Ecell∘ > 0, then _____________ Group of answer choices Δ?∘ΔG∘ > 0 K < 1 the reaction is spontaneous under both standard and nonstandard conditions. the reactants are less abundant than the products in the equilibrium mixture.A 100.0-mL sample of 1.00 M NaOH is mixed with 50.0 mL of 1.00 M H2SO4 in a large Styrofoam coffee cup calorimeter fitted with a lid through which a thermometer passes. The acid-base reaction is as follows: 2 NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2 H2O(ℓ) The temperature of each solution before mixing is 22.3 °C. After mixing, the temperature of the solution mixture reaches a maximum temperature of 31.4 °C. Assume the density of the solution mixture is 1.00 g/mL, its specific heat is 4.18 J/g⋅°C, and no heat is lost to the surroundings. Calculate the enthalpy change, in kJ, per mole of H2SO4 in the reaction. +85.6 kJ/mol ‒85.6 kJ/mol +5.71 kJ/mol ‒5.71 kJ/mol ‒114 kJ/molA lead storage battery delivers a current of 6 A for one hour and 22 minutes at a voltage of 12 V.Pb(s) + PbO2(s) + 2SO42-(aq) + 4H+ → 2PbSO4 (s) + 2H2Oa. How many grams of Pb are converted to PbSO4?b. How much electrical energy is produced in kilowatt hours?
- Under standard conditions, what reaction occurs, if any, when each of the following operations are performed? For the reactions that occur, write a balanced, net ionic equation and calculate ℰ°, ΔG°, and K at 25°C. (Use the lowest possible coefficients. Include states-of-matter at 25°C and 1 atm in your answer. If an answer does not exist, enter DNE.) (a) Cl2 gas is bubbled into a solution of NaI. ℰ° V ΔG° kJ K (c) A silver wire is placed in a solution of CuCl2. ℰ° V ΔG° kJ K (d) An acidic solution of FeSO4 is exposed to air. ℰ° V ΔG° kJ KA certain metal M forms a soluble sulfate salt M2SO4 . Suppose the left half cell of a galvanic cell apparatus is filled with a 5.00 M solution of M2SO4 and the right half cell with a 2.50mM solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 40.0C.how much heat is evolved or absorbed when 25.0g of silver oxidizes to form silver oxide (Ag2O) under standard conditions? The enthalpy of formation of Ag2O is 31.05kJ Mol-1 and the molar mass of silver is 107.87 g mol-1 2Ag(s) + 1/2 O2 (g) = Ag2O (s)
- Zinc may be directly leached from zinc-lead sulphide concentrates by reaction with sulphuricPbS(s) + H2SO4 + 1 O2(g) → PbSO4(solid) + S° + H2O 21ZnS(s) + H2SO4 + 2 O2(g) → ZnSO4(aq) + S° + H2Oacid and oxygen. In addition, lead sulphide will be oxidized to give insoluble lead sulphate:Assume that a plant is to treat 400 t/day of concentrate containing 20.0 weight % Zn as ZnS and 110.0 weight % Pb and PbS. The concentrate and leach solution enters the leaching vessel at 32.0% solids. During the leach, 85.0% of the zinc is extracted and all the lead sulphide is oxidized. After the leaching step, the slurry passes to a thickener.(a) Calculate the concentration of Zn (in g/L) in the solution passing to metal recovery. Assume a solution density of 1.11 g/mL.(b) Calculate the tonnes per day of elemental sulphur produced.NOTE: â% solidsâ is the solids content of a slurry (consisting of particles and solution) and is defined as…When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(II) sulfate PbSO4 is reduced to lead at the cathode and oxidized to solid lead(II) oxide PbO at the anode. Suppose a current of 59.0A is fed into a car battery for 66.0 seconds. Calculate the mass of lead deposited on the cathode of the battery. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbolElectrochemical Equilibria: Electrochemical CellsHydrogen fuel cells produce electricity by utilizing a redox reaction between hydrogen gasand oxygen gas without the need for combustion. Oxidation of hydrogen gas to waterhappens at the anode, while reduction of oxygen gas to hydroxide happens at the cathode.A certain hydrogen fuel cell consumes pure hydrogen at the anode side at 80 kPa and usesair at 1 bar as the oxygen source in the cathode side. This fuel cell operates at 30 oC.Assuming no side reactions due to the existence of nitrogen in the cathode, answer thefollowing:a) What is the overall reaction? How is the overall reaction it different fromhydrogen combustion?b) Determine the standard cell potential, Eocellc) Determine the actual cell potential, Ecelld) What can you say about the spontaneity of the actual fuel cell reaction at lowtemperatures? Will spontaneity decrease or increase at lower temperatures?