Chapter 17.docx

# Chapter 17.docx - Chapter 17 Nickel and aluminum electrodes...

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Chapter 17 Nickel and aluminum electrodes are used to build a galvanic cell. The standard reduction potential for the nickel(II) ion is -0.26 V and that of the aluminum(III) ion is -1.66V Part A What is the theoretical cell potential assuming standard conditions? E 0 cell = E 0 reduction + E 0 oxidation E 0 cell = -0.26 – (-1.66) E 0 cell = 1.40 V Part B Complete the sentences describing the cell Match the words Al, Ni to the appropriate blanks in the sentences on the right. 1. In the nickel-aluminum galvanic cell, the cathode is Nickel electrode 2. Therefore, electrons flow from Aluminum electrode to Nickel electrode 3. The Aluminum electrode loses mass, while the, Nickel electrode gains mass. Part C Complete the shorthand notation for this cell. Al| Al 3+ || Ni 2+ |Ni Drag the appropriate labels to their respective targets. For neutral species, leave the pink target blank.

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Answer: Balance each of the following half-reactions, assuming that they occur in basic solution Part A O2(g) OH-(aq) 4e - + 4H2O + O2(g) 4OH-(aq) Part B H 2 O 2 (aq) O 2 (g)
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