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answer key practice problem chap19

answer key practice problem chap19 - Mg 2(aq 0.045M Sn is...

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Practice for ch 19 Questions. Keys are shown in bold. Q1-3. Cu + 2H 2 SO 4 CuSO 4 + SO 2 + H 2 O 1. Which species is the oxidizing agent? H 2 SO 4 2. Which species is oxidized? Cu 3. What is the oxidation number for Cu and S in CuSO 4 ? +2 and +6 4. When the reaction Cu + HNO 3 Cu 2+ + NO + H 2 O is balanced in acidic solution, the coefficient of H + is _____. A) 2 B) 4 C) 3 D) 6 5. When the reaction Cr 2 O 7 2- + + C 2 O 4 2- Cr 3+ + CO 2 is balanced in acidic solution, the coefficient of C 2 O 4 2- is _____.
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6. ΔG for the cell reaction Mg + Sn 2+ (aq, 0.035M)
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Unformatted text preview: Mg 2+ (aq, 0.045M) + Sn is –––– kJ/ mol. A) –496 B) –206 C) –406 D) –430 7. The emf of a cell consisting of a Pb/Pb 2+ (0.01 M) half-cell and a Pt/H + (0.050 M)/H 2 (g, 1 atm) half-cell is _____. A) 0.83 V B) 1.02 V C) 0.43 V D) 0.083 V 8. The mass of copper and Br 2 produced in 1.00 hr at inert electrodes in a CuBr 2 solution by a current of 4.50 A is _____. A) 0.340 g, 3.58g B) 0.0533 g, 1.34 g C) 5.33 g, 13.4g D) 6.53 g, 6.89g...
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