In some applications nickelcadmium batteries have been replaced by nickelzinc batteries. The overall cell reaction for this
Question:
In some applications nickel–cadmium batteries have been replaced by nickel–zinc batteries. The overall cell reaction for this relatively new battery is:
2H2O(I) + 2NiO(OH)(s) + Zn(s) → 2Ni(OH)2(s) + Zn(OH)2(s)
(a) What is the cathode half-reaction?
(b) What is the anode half-reaction?
(c) A single nickel–cadmium cell has a voltage of 1.30 V. Based on the difference in the standard reduction potentials of Cd2+ and Zn2+, what voltage would you estimate a nickel–zinc battery will produce?
(d) Would you expect the specific energy density of a nickel–zinc battery to be higher or lower than that of a nickel–cadmium battery?
Step by Step Answer:
a Cathode half reaction is 2NiOOH s 2H 2 O I 2e 2NiOH 2 s 2OH aq In t...View the full answer
Chemistry The Central Science
ISBN: 9780321910417
13th Edition
Authors: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
