pace). For this spe charge ra cycle count. The battery still used in many space
ID: 227968 • Letter: P
Question
pace). For this spe charge ra cycle count. The battery still used in many space endeavors is the tio and an outstanding recharge en battery. This problem will look at this lightweight battery that was the precursor to nicke etal hydride batteries. H2 (g) + NiOOH(s)- Ni(OH)2 (s) Basic, Unbalanced] a. For the reaction of interest (nickel-hydrogen reaction above): (0write the balanced reduction reaction, (ijthe balance oxidation reaction,(li) the total reaction and, (ivjidentify the number of electrons transferred. What is the standard reduction potential for the nickel half reaction given the information on the last page and that the cell potential is 1.35 V? b.
Explanation / Answer
For the given battery
a. Oxidation half-cell
H2(g) ---> 2H+(aq) + 2e-
reduction half-cell
NiOOH(s) + 2e- --> Ni(OH)2(s)
Overall reaction
H2(g) + 2NiOOH(s) --> 2Ni(OH)2(s)
Number of electrons transferred = 2
b. Given cell potential = 1.35 V
So,
standard reduction potential for Ni cell = 1.35 + 0 = 1.35 V
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