2. A mass balance is being made for a proposed carbothermic reduction process for thezinc calcine. Enough carbon (in the form of graphite, pure C) will be added to reduceall the lead, zinc oxide and sulphate in the calcine to metallic lead and zinc vapour, andto reduce all the hematite to FeO. The sulphur will leave the system as SO2 and it isassumed that all the carbon will wind up as CO in the off-gas.stoichiometrically required mass of graphite?480 T per day Zinc calcine(72.67% ZnO. 0.25% ZnSO4.17% Fe2O3, 2.37% PbSO4)GraphiteWhat is theZnCarbothermicReduction8Pb FeO SO₂ CO

ZnO+C→Zn+CO ZnSO4+2C→SO2+2CO Fe2O3+C→2FeO+CO PbSO4+2C→Pb+SO2+2CO…

Answered: 2. A mass balance is being made for a…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 9RQ: What characterizes an electrolytic cell? What is an ampere? When the current applied to an...

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What characterizes an electrolytic cell? What is an ampere? When the current applied to an electrolytic cell is multiplied by the time in seconds, what quantity is determined? How is this quantity converted to moles of electrons required? How are moles of electrons required converted to moles of metal plated out? What does plating mean? How do you predict the cathode and the anode half-reactions in an electrolytic cell? Why is the electrolysis of molten salts much easier to predict in terms of what occurs at the anode and cathode than the electrolysis of aqueous dissolved salts? What is overvoltage?
Determine the standard free energy change, Gf, for the formation of S2-(aq) given that the Gf for. Ag*(aq) and Ag2S(s) are 77.1 kJ/mole and 395 kJ/mole respectively, and the solubility product for Ag2S(s) is 81051.
When jump-starting a car with a dead battery, the ground jumper should be attached to a remote part of the engine block. Why?
The decomposition of N,O5 to NO, and O, is first order, with a rate constant of 4.80 x 10-4/s at 45° C. a. If the initial concentration is 1.65 x 10-2 mol/L, what is the concentration after 825 s? b. How long would it take for a concentration of N,O5 to decrease to is 1.00 × 10-2 mol/L from its initial value, given in a? 02017 Cennace
15.) If a form sample of pure hydrouen gs is ignitecd ry.carctielly the hydragun burng gently.combining with the axyqun gas ofthe air Write theuabalanced chemical eiAcetion for this reaction. water. vapor. 15 17.) If electricity of sufficient voltage is passed into a potaosium iudice in water, solution af a reaction takes place in which clemental hydcore asolution ot potassium hydroxida. Write the unbalanced equaticn for this process. gas, and elemintal iodine are produed, Icaving A) Elemental boron is pcoduced in one inclustrial process by heating diharon trio xide with magnesium metal, also producing magnesium oxide es a by prochuct, Write the unbre chemical iquatien for this processr 21) Phosphorus trichloride 's woed in the maoufucture certain be Syrthesizee by d pesticides and may combination of its constituent elements, Write the unbalanced quathion for this process. Chemical
10. When an orange coloured crystalline compound 'A' was heated with common salt and concentrated sulphuric acid, an orange red coloured gas 'B' was evolved. The gas 'B' on passing through NaOH solution gave a yellow solution 'C'. The solution on reacting with an aqueous solution of lead acetate gave a yellow ppt. When H2O2 is added to an acidic solution of 'A', a blue peroxo species CrO5 is formed. (i) Name the crystalline compound (A). What is the gas (B)? (ii) (iii) What is the yellow solution (C)? (iv) Write the reaction of (A) with H2O2 in acidic solu- tion to give CrO5.
Please help me with question 19.67.
A constant cuIrent of 9.25 amperes is passed through a cell containing iridium (III) nitrate, Ir(NO,); for 7.57 hours. How many grams of iridium will plate out onto the cathode?
(a) Write the definition of reduction and oxidation. (b) Ammonia oxidizing bacteria (AOB) play an important role in nitrogen cycle. They are also utilized in engineered systems to remove ammonia in wastewater treatment. They obtain energy by oxidizing ammonia NH3 into nitrite (NO2-) and reducing oxygen to water. Balance the reduction and oxidation reactions driven by AOB. (c) Combine the redox reactions into a single reaction. (d) Find ΔG° for the combined reaction. (e) Find ΔG for the given conditions: [NH3] = 2.7 × 10-3 M; pO2 = 0.21 atm; [NO2-] = 1.2 × 10-5 M. If necessary assumeneutral pH (i.e., pH = 7). Are the given conditions favourable for AOB growth?
How many coulombs are released when H2O is oxidized to liberate 1.00 mol O2 in the reaction 2H2O S O2 1 4H1 1 4e2?
In the In the old Weldon process, chlorine was made from by-product HCl by the reaction: MnO2 + HCl → MnCl 2 + Cl 2 + H2O Into a retort were charged 500 lb pyrolusite (86% MnO2) and 3500 lb hydrochloric acid (S.G. 1.098,20% HCl). The reaction was 92% complete. Determine (a) the limiting reactant based on mole ratio(b) lb Cl2 produced, (c) % excess reactant (d) % yield of MnCl2 if the actual amount of MnCl2 producedis 500lb. (MW: Mn=54.94, Cl = 35.45)
8:51 AM Mon Dec 5 = S BIOL 286 E B Lecture Pow... Bb Lecture Pow... O ELECTROCHEMISTRY Recognizing consistency among equilibrium constant, free... cell A B A student made measurements on some electrochemical cells and calculated three quantities: • The standard reaction free energy AG. The equilibrium constant K at 25.0 °C. • The cell potential under standard conditions º His results are listed below. Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the box next to the incorrect quantity in each row, if any. C Note: If there is a mistake in a row, only one of the three quantities listed is wrong. Also, you may assume the number of significant digits in each quantity is correct. Also note: for each cell, the number n of electrons transferred per redox reaction is 1. n 1 AA 1 1 Explanation 142. kJ/mol O calculated quantities (Check the box next to any that are wrong.) AG - 50. kJ/mol O - 46. kJ/mol O Check www-awu.aleks.com K 24 7.54 x 10 O…

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