Given the reaction for the nickel-cadmium battery:
2NiOH + Cd +2H2O -> 2Ni(OH)2 + Cd(OH)2
What species is oxidized during the discharge of the battery?
A. Ni3+
B. Ni2+
C. Cd
D. Cd2+
The NiCd battery is a rechargeable battery used in cordless appliances and tools. During discharge the Cdo is oxidized to form Cd2+. Cd loses 2 electrons to become positively charged. Remember in oxidation atoms lose (or seem to lose) electrons.