A. Oxidizing agent5. When the substance lost electrons, it is said to beA. oxidizedB. reducedD. None of the choices6. What is the value of the oxidation state of a free and uncombined element?A. +2B. +1C.0D.-27. What is the oxidation state of Cl in the ion CIO3-¹?A. +5B. +4C. -1D. -58. What is the usual oxidation state of Oxygen?A. +2B. +1C. 0D.-29. Galvanic cells convert chemical energy into what other form of energy?A. electricalB. mechanicalC. thermalD. radioactive10. In a voltaic cell, what is the element that is used in the cathode?A. BismuthB. CopperC. GoldD. Zinc11. What part of the electrochemical cell does oxidation occur?B. CathodeA. AnodeD. Salt bridgeC. Motor12. What is the oxidation state of N₂?A. +2B. +1C.0D.-213. In the reaction, 2H₂ (g) + O₂(g) → 2H₂O (g), which of the following is the oxidizing agent?C. H₂OA. H₂B. 0₂D. None of the choices14. In the reaction, 2H₂ (g) + O2(g) → 2H₂O (g), which of the following is the reducing agent?C. H₂OD. None of the choicesB. 02A. H₂15. What are the original and final oxidation numbers for iron in the smelting of iron from iron oxide?Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)C.0 +2B. +3-0D. No changeA. +2 016. A reducing agent reduces other substances and loses electrons; therefore, its oxidation state willC. stay the sameB. increaseA. decrease?D. none of the choices17. A monoatomic ion has an oxidation state equal to its charge. What is the oxidation state of Ca²+?B. +1A. +2C.0D.-218. In the reaction, Fe2O3 (1) +CO (g) →→Fe (1) + CO2 (g), how many electrons does Fe gain?A. 1B. 2C. 3D. 419. In the reaction, Fe2O3 (1) + CO (g) → Fe (1) + CO2 (g), how many electrons does Fe gain?A. 1B. 2C. 3D. 420. Which of the following refers to the branch of chemistry that deals with the conversion of electrical energy into chemical energyor chemical energy to electrical energy?A. AnatomyB. ElectrochemistryC. ThermodynamicsD. Physics21. Reduction potential is measured in what units?A. AmperesB. OhmsC. VoltsD. None of the choices22. When performing galvanic cell, what is the standard conditions for the solutions?A. 1 MB. 2 MC. 3MD.4M23. The redox reaction happening in a galvanic cell permits the flow of what kind of particle shown in a voltmeter?D. ProtonsC. NeutronsA. ElectrolyteB. ElectronsC. reproduced

Since you have posted multiple questions according to guidelines I am solving first three.If you…

A. Uxlotzing agent 5. When the substance lost electrons, it is said to be A. oxidized B. reduced 6. What is the value of the oxidation state of a free and uncombined element? C. 0 A. +2 B. +1 7. What is the oxidation state of Cl in the ion CIO3-¹? C. -1 A. +5 B. +4 2. Wha unual oxidation state of Oxygen? C. reproduced D. None of the choices D.-2 D. -5 D.-2

A. Uxlotzing agent 5. When the substance lost electrons, it is said to be A. oxidized B. reduced 6. What is the value of the oxidation state of a free and uncombined element? C. 0 A. +2 B. +1 7. What is the oxidation state of Cl in the ion CIO3-¹? C. -1 A. +5 B. +4 2. Wha unual oxidation state of Oxygen? C. reproduced D. None of the choices D.-2 D. -5 D.-2

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter4: Types Of Chemical Reactions And Solution Stoichiometry

Section: Chapter Questions

Problem 109AE: The blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with an...

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Complete and balance the following oxidation-reduction reactions, which give the highest possible oxidation state for the oxidized atoms. (a) Al(s)+F2(g) (b) Al(s)+CuBr2(aq) (single displacement) (c) P4(s)+O2(g) (d) Ca(s)+H2O(l) (products are a strong base and a diatomic gas)
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)
The blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with an acidic potassium di-chromate solution, resulting in the production of Cr3+ (aq) and carbon dioxide. The reaction can be monitored because the dichromate ion (Cr2O72) is orange in solution, and the Cr3+ ion is green. The balanced equations is 16H+(aq) + 2Cr2O72(aq) + C2H5OH(aq) 4Cr4+(aq) + 2CO2(g) + 11H2O(l) This reaction is an oxidationreduction reaction. What species is reduced, and what species is oxidized? How many electrons are transferred in the balanced equation above?
Complete and balance the following oxidation-reduction reactions, which give the highest possible oxidation state for the oxidized atoms. (a) K(s)+H2O(l) (b) Ba(s)+HBr(aq) (c) Sn(s)+I2(s)