pace For this spe charge ra cycle count The battery still us

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.

Solution

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