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.
. A student proposed that the balanced chemical equation for this reaction s: Pb(NO,), + 2Nal > Pbl, + 2NaNO, Determine whether this is a correctly balanced equation and give eviðdence for your conclusion. Chemical Processes
A piece of solid Sn metal is put into an aqueous solution of FeSO4. Write the net ionic equation for any reaction that may be predicted. Be sure to specify states such as (aq) or (s).
Please help me with question 19.67.
The oxidation–reduction reactionCr2O72-(aq) + 14 H+(aq) + 6 I-(aq)--->2 Cr3+(aq) + 3 I2(s) + 7 H2O(l)is spontaneous. A solution containing K2Cr2O7 and H2SO4 is poured into one beaker, and a solution of KI is poured into another.A salt bridge is used to join the beakers. A metallic conductor that will not react with either solution (such as platinum foil) issuspended in each solution, and the two conductors are connected with wires through a voltmeter or some other device to detectan electric current. The resulting voltaic cell generates an electric current. Indicate the reaction occurring at the anode, thereaction at the cathode, the direction of electron migration, the direction of ion migration, and the signs of the electrodes.
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)
The water supply for a midwestern city contains the followingimpurities: coarse sand, finely divided particulates,nitrate ions, trihalomethanes, dissolved phosphorus in theform of phosphates, potentially harmful bacterial strains,dissolved organic substances. Which of the following processesor agents, if any, is effective in removing each ofthese impurities: coarse sand filtration, activated carbonfiltration, aeration, ozonization, precipitation with aluminumhydroxide?

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