Electrochemistry

Electrochemistry - 1. Electrochemistry Element M reacts...

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Electrochemistry 1. Element “M” reacts with oxygen to from an oxide with the formula MO. When MO is dissolved in water, the resulting solution is basic. Element “M” is most likely: A. Na B. Ba C. S D. N E. Al 2. What is the oxidation state of Xe in XeO 4 ? A +8 B +6 C +4 D +2 E 0 3. The sulfur in which of the following species cannot act as an oxidizing agent? A. SO 2 B. SO 4 2 C. SO 3 2 D. S 8 E. H 2 S 4. In sodium arsenite, Na 3 AsO 3 , the oxidation number of arsenic is A. 5 B. 3 C. Zero D. +5 E. +3 5. Which oxide has nitrogen in the lowest oxidation state? A. N 2 O B. N 2 O 3 C. NO D. NO 2 E. N 2 O 4
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6. When the redox equation MnO 4 (aq) + H + (aq) + H 3 AsO 3 (aq) Mn 2+ (aq) + H 3 AsO 4 (aq) + H 2 O(l) is properly balanced, the coefficients will be: MnO 4 H + H 3 AsO 3 Mn 2+ H 3 AsO 4 H 2 O A. 1 3 10 1 1 1 B. 2 14 10 2 10 15 C. 4 12 10 4 10 6 D. 1 3 2 1 2 1 E. 2 6 5 2 5 3 7. When the following reaction that takes place in acidic solution is balanced, the number of protons (H + (aq)) that will be involved in the balanced equation is: Cr 2 O 7 2 (aq) + I (aq) Cr 3+ (aq) + IO 3 (aq) A. 2 B. 4 C. 6 D. 8 E. None of the above. 8. When the following reaction that takes place in basic solution is balanced, the number of hydroxide ions (OH (aq)) that will be involved in the balanced equation is: CN (aq) + MnO 4 (aq) CNO (aq) + MnO 2 (s) A. 2 B. 4 C. 6 D. 8 E. None of the above. 9. Which is the best reducing agent in the following set? A. Cl (aq) B. Fe(s) C. Fe 3+ (aq) D. Fe 2+ (aq) E. Cl 2 (g)
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10. Arrange the following oxidizing agents in order of increasing oxidizing power: I 2 (s), IO 3 - (aq), F 2 (g), PbO 2 (s), Na + (aq), Zn 2+ (aq) A. I 2 < Zn 2+ < IO 3 < PbO 2 < Na + < F 2 B. F 2 < PbO 2 < IO 3 < I 2 < Zn 2+ < Na + C. I 2 < IO 3 < PbO 2 < F 2 < Zn 2+ < Na + D. Na + < Zn 2+ < I 2 < IO 3 < PbO 2 < F 2 E. I 2 < IO 3 < PbO 2 < F 2 < Na + < Zn 2+ 11. The oxidizing agent in this cell is? 2 Ag
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This note was uploaded on 12/20/2011 for the course CHEM 112 taught by Professor Vandersluys,lorschmid,kylem during the Fall '07 term at Penn State.

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Electrochemistry - 1. Electrochemistry Element M reacts...

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