answer.Which chemical equation represents a redox reaction?OA. Mg(CIO3)2 + 2HCl → MgCl₂ + 2HCIO3O B.CO + H₂O → H₂ + CO2OC.с.2NH4NO3 + CuCl2 → 2NH4Cl + Cu(NO3)2OD.Na₂SO3 + FeBr2 → 2NaBr + FeSO3All rights reserved

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correct answer. Which chemical equation represents a redox reaction? OA. Mg(CIO3)2 + 2HCI → MgCl₂ + 2HCIO3 CO + H₂O → H₂ + CO2 2NH4NO3 + CuCl2 → 2NH4Cl + Cu(NO3)2 Na2SO3 + FeBr2 → 2NaBr + FeSO3 All rights reserved O B. OC. O D.

correct answer. Which chemical equation represents a redox reaction? OA. Mg(CIO3)2 + 2HCI → MgCl₂ + 2HCIO3 CO + H₂O → H₂ + CO2 2NH4NO3 + CuCl2 → 2NH4Cl + Cu(NO3)2 Na2SO3 + FeBr2 → 2NaBr + FeSO3 All rights reserved O B. OC. O D.

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 47PS

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Chromium has been investigated as a coating for steel cans. The thickness of the chromium film is determined by dissolving a sample of a can in acid and oxidizing the resulting Cr3+ to Cr2O72 with the peroxydisulfate ion: S2O82(aq) + Cr3+(aq) + H2O(l) Cr2O72(aq) + SO42(aq) + H+(aq) (Unbalanced) After removal of unreacted S2O82 an excess of ferrous ammonium sulfate [Fe(NH4)2(SO4)26H2O] is added, reacting with Cr2O72 produced from the first reaction. The unreacted Fe2+ from the excess ferrous ammonium sulfate is titrated with a separate K2Cr2O7 solution. The reaction is: H+(aq) + Fe2+(aq) + Cr2O72(aq) Fe3+(aq) + Cr3+(aq) + H2O(l) (Unbalanced) a. Write balanced chemical equations for the two reactions. b. In one analysis, a 40.0-cm2 sample of a chromium-plated can was treated according to this procedure. After dissolution and removal of excess S2O82, 3.000 g of Fe(NH4)2(SO4)26H2O was added. It took 8.58 mL of 0.0520 M K2Cr2O7 solution to completely react with the excess Fe2+. Calculate the thickness of the chromium film on the can. (The density of chromium is 7.19 g/cm3)
(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?
Which of the reactions below is/are redox reaction(s)? K2CrO4(aq) + BaCl2(aq) → BaCrO4(s) + 2KCl(aq) 2HNO3(aq) + Ba(OH)2(aq) → Ba(NO3)2(aq) + 2H2O(l) Cu(s) + S(s) → CuS(s) Group of answer choices none of these 3 1 and 2 1, 2 and 3 2 2 and 3 1 1 and 3
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Which reaction is a redox reaction? Please explain why.. A) KOH(aq) + HNO3(aq) --> KNO3(aq) + H2O(l) B) Ca(OH)2(aq) + 2HNO3(aq) --> 2H2O(l) + Ca(NO3)2(aq) C) 2Al(s) + 3Br2(l) --> 2AlBr3(s) D) AgNO3(aq) + KCl(aq) --> AgCl(s) + KNO3(aq)
8) Which of the following reactions is a redox reaction?(a) K2CrO4 + BaCl2 → BaCrO4 + 2KCl(b) Pb2+ + 2Br- → PbBr2(c) Cu + S → CuSA) (a) onlyB) (b) onlyC) (c) onlyD) (a) and (c)
Which of the following reaction is a redox reaction? Group of answer choices CaCO3--> CaO+CO2 CH3COOH+NaOH --> CH3COONa+ H2O HCl+NaOH --> NaCl+H2O NaCl ----> Na+ + Cl-
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REDOX REACTIONS: Work neatly to balance these 10 equations using the half-reaction method. 1. MnO4- + H2O2 ---> Mn2+ + O2 in acid 2. NO2- + I- ---> NO + I2 in acid 3. S2- + I2 ---> SO42- + I- in base 4. Pb + PbO2 ---> Pb2+ in acid 5. Cu + NO3- ---> NO + Cu2+ in acid 6. Cr2O72- + Cl- ---> Cl2 + CrCl3 in acid 7. MnO4- + C2O42- ---> Mn2+ + CO2 in acid 8. Fe(OH)2 + MnO4- ---> MnO2 + Fe(OH)3 in base 9. Fe(OH)2 + Pb(OH)3 ---> Fe(OH)3 + Pb in base 10. P4 ---> HPO32- + PH3 in base
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