Name: Pedram karimi Part A: Knowledge and Understanding (/10) 6. SCH4U Unit 5 Electrochemistry 1. 4. The electrode at which oxidation occurs is called the a. oxidizing agent b. cathode reducing agent c. d. anode 2. Which of the following is an oxidation-reduction reaction? a. Na →→ Nat + 1e b. 2 SO₂ + O2 - 2 SO3 c. - C. N₂O4 → 2 NO₂ d. 2 e + F₂ → 2 F 3. Which element is oxidized in the chemical reaction shown by the following chemical equation? a. C b. H 3 Cu (s) C. N d. O e. This is not a redox reaction In the reaction Fe -> a. oxidized b. reduced + 8HNO3 (aq) Date: Dec/25/2023 c. CaH₂ d. CH₁ e. H₂ c. electrolyzed d. the oxidizing agent Ontario Virtual School 3 Cu(NO3)2 (aq) Fe³+ + 3e, the species Fe is 5. In which of the following molecules does hydrogen have an oxidation state of -1? a. H₂O b. NH3 + 2NO (g) + 4 H₂O (1) What are the oxidation numbers in the compound H3PO4? a. H=+1, P = 0, O = -2 b. H=+1, P = +5, 0 = -2 c. H = -1, P = +7,0 = -1 d. H=+1, P = + 1, 0 = -1

Name: Pedram karimi Part A: Knowledge and Understanding (/10) 6. SCH4U Unit 5 Electrochemistry 1. 4. The electrode at which oxidation occurs is called the a. oxidizing agent b. cathode reducing agent c. d. anode 2. Which of the following is an oxidation-reduction reaction? a. Na →→ Nat + 1e b. 2 SO₂ + O2 - 2 SO3 c. - C. N₂O4 → 2 NO₂ d. 2 e + F₂ → 2 F 3. Which element is oxidized in the chemical reaction shown by the following chemical equation? a. C b. H 3 Cu (s) C. N d. O e. This is not a redox reaction In the reaction Fe -> a. oxidized b. reduced + 8HNO3 (aq) Date: Dec/25/2023 c. CaH₂ d. CH₁ e. H₂ c. electrolyzed d. the oxidizing agent Ontario Virtual School 3 Cu(NO3)2 (aq) Fe³+ + 3e, the species Fe is 5. In which of the following molecules does hydrogen have an oxidation state of -1? a. H₂O b. NH3 + 2NO (g) + 4 H₂O (1) What are the oxidation numbers in the compound H3PO4? a. H=+1, P = 0, O = -2 b. H=+1, P = +5, 0 = -2 c. H = -1, P = +7,0 = -1 d. H=+1, P = + 1, 0 = -1

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A. Write a balanced equation for reaction that will occur in a galvanic cell consisting of a nickel electrode, 0. 45 M Ni2+ (aq), a platinum electrode, 1.0 M MnO4-, 2.0 M H+, and 0.10 M Mn2+. B. What is E° for this cell?MnO4- + 8 H+ + 5e- --> Mn2+ + 4 H2O E° = 1.51 VNi2+ + 2 e- --> Cu E° = - 0.23 V C. How would you predict that E would compare to E o under the conditions described above? Explain.
3. A voltaic cell similar to the drawing shown previously is constructed. One electrode compartment consists of a cadmiumstrip placed in a solution of Cd(NO3)2 and the other has a nickel strip placed in a solution of NiSO4. The overall reaction is Cd + Ni2+⟶ Cd2+ + Ni a. Write the half-reactions that occur in the two electrodes.b. Which electrode is the anode, and which is the cathode?c. Indicate the signs of the electrodes.
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A redox reaction shifted to the right side when: a. E° = 0 b. E° > 0 a c. E° < 0
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A galvanic (voltaic) cell is made using the 2 half cells: Zn2+ (aq) + 2e → Zn(s) E =-.763 V Mg2+ (aq) + 2e - → Mg(s) with Zn(s) and Mg(s) as the electrodes. Answer the questions A. It is the anode. [Select ] B. It is the cathode. [Select] C. Electrons in the wire flow toward it. [Select]. D. Anions from the salt bridge flow toward it. [Select] E. Gains mass. [Select] E = -2.37 V F. Losses mass. [Select]
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2. Electrolysis of molten NaCl in a Downs cell is the major isolation step in the production of sodium metal. Assuming that 215 g of Na metal forms, a. How many moles of electrons are required? b. How many coulombs are required? C. How many amps will produce this amount in 9.50 h?