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Feedback electrolysis

# Feedback electrolysis - 2 is more likely to be formed at...

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20.28. One half-cell in a voltaic cell is constructed from a copper wire dipped into a 4.8  10 −3  M solution of Cu(NO 3 ) 2 The other half-cell consists of a zinc electrode in a 0.40 M solution of Zn(NO 3 ) 2 . Calculate the cell potential. 1.088 V 1.43 V 1.043 V 0.88 V Feedback: Wrong choice! 20.36. Use the standard reduction potentials (Appendix M) for the half-reactions [Zn(OH) 4 ] 2− (aq) + 2 e   Zn(s) + 4  OH (aq) and Zn 2+ (aq) + 2 e   Zn(s) to calculate the value of  K formation  for the complex ion [Zn(OH) 4 ] 2− . 10 14 10 15 10 15 10 14 Feedback:

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Wrong choice! 20.42. Which product, Ca or H 2 , is more likely to form at the cathode in the electrolysis of CaCl 2 ? Explain your  reasoning. H 2  is much more difficult to reduce than water, so Ca
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Unformatted text preview: 2+ is more likely to be formed at the cathode. Ca 2+ is much more difficult to reduce than water, so H 2 is more likely to be formed at the cathode. H 2 is much more difficult to oxidize than water, so Ca 2+ is more likely to be formed at the cathode. Ca 2+ is much more difficult to oxidize than water, so H 2 is more likely to be formed at the cathode. Feedback: Wrong choice! 20.45. In the electrolysis of a solution containing Ni 2+ (aq), metallic Ni(s) deposits on the cathode. Using a current of 0.150 A for 12.2 min, what mass of nickel will form? 14.970 g Ni 0.0334 g Ni 0.0449 g Ni 0.0668 g Ni Feedback: Wrong choice!...
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Feedback electrolysis - 2 is more likely to be formed at...

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