Question

Nickel cadmium batteries which are stored for a long period of time will show a low liquid level because

Answer 1

NiCad batteries can exhibit a low liquid level after storage due to self-discharge and dehydration, which occurs even when not in use.

Step-by-step explanation:

Nickel-cadmium batteries, or NiCad batteries, may show a low liquid level after being stored for a long period due to the gradual self-discharge and potential dehydration. NiCad batteries are water-based cells containing a cadmium anode and a highly oxidized nickel cathode described as nickel(III) oxo-hydroxide (NiO(OH)). Over time, even when not in use, these batteries can self-discharge, chemistry involved may generate gases as byproducts, which can lead to water loss through electrolysis, evaporation, or both. Consequently, the liquid level within the battery can drop.

To maintain the optimal performance of these batteries and ensure a proper liquid level, it is recommended to store them in a cool and dry place and periodically charge them. Proper handling and disposal are crucial because cadmium is a toxic heavy metal, and NiCad batteries should be disposed of in accordance with relevant toxic waste guidelines to prevent environmental contamination.

Answer 2

NiCad batteries can show a low liquid level due to self-discharge or evaporation over a long period of storage, not due to proton exchange.

Step-by-step explanation:

Nickel-cadmium (NiCad) batteries, when stored for a long period of time, may show a low liquid level due to a number of reasons, none of which are related to the number of protons leaving or entering the battery. NiCad batteries, such as those used in pacemakers, contain a cadmium anode and a highly oxidized nickel cathode.

Over time, these batteries can experience self-discharge, where charge is lost even when the battery is not in use. Additionally, if a NiCad battery is not properly sealed, evaporation of the water in the electrolyte can occur, leading to a low liquid level. It’s also important to note that cadmium is a toxic heavy metal, and these batteries should be treated with care, never ruptured or incinerated, and disposed of in accordance with relevant toxic waste guidelines.