Which of the following statement about voltaic and electrolytic cells is correct

Question

Which of the following statement about voltaic and electrolytic cells is correct? The electrons in the external wire from cathode to anode in both types of cell. Oxidation occurs at the cathode only in a voltaic cell. The free energy change, Delta G, is negative for an electrolytic cell. The cathode is labeled as positive (+) in a voltaic cell but negative (-) in an electrolytic cell. Reduction occurs at the anode in an electrolytic cell. A cell can be prepared from copper and tin. What is for the cell that forms from the following half-reactions? 0.47 V 0.21 V -0.21 V -0.47 V 0.42 V Examine the following half-reactions and select the strongest oxidizing agent among the substances. [PtCl4]2-(aq) RuO4(s) HFeO4-(aq) H4XeO6(aq) Cl-(aq) Calculate Delta G degree for the reaction of iron (II) ions with one mole of permanganate ions. -71.4 kJ -286 kJ -357 kJ -428 kJ none of the above

Explanation / Answer

29) A & D

30) B

31) D

32) A

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