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lys-0071 [83]
3 years ago
6

What species is/are formed at the anode of the alkaline fuel cell?

Biology
1 answer:
umka21 [38]3 years ago
3 0

Fuel cells can make an electricity from a simple electrochemical reaction in which oxygen and hydrogen combine to form water. There are several different types of fuel cell but they are all based around a central design which consists of two electrodes, a negative anode and a positive cathode. These are separated by a solid or liquid electrolyte that carries electrically charged particles between the two electrodes. A catalyst, such as platinum, is often used to speed up the reactions at the electrodes. Fuel cells are classified according to the nature of the electrolyte. Every type needs particular materials and fuels and is suitable for any applications. The article below uses the proton exchange membrane fuel cell to illustrate the science and technology behind the fuel cell concept but the characteristics and applications of the other main designs are also discussed.  Proton Exchange Membrane Fuel Cells (PEMFC)

The hydrogen ions permeate across the electrolyte to the cathode, while the electrons flow through an external circuit and provide power. Oxygen, in the form of air, is supplied to the cathode and this combines with the electrons and the hydrogen ions to produce water. These reactions at the electrodes are as follows:

Anode: 2H24H+ + 4e-

Cathode: O2 + 4H+ + 4e- 2H2O

Overall: 2H2 + O22H2O + energy

PEM cells operate at a temperature of around 80°C. At this low temperature the electrochemical reactions would normally occur very slowly so they are catalysed by a thin layer of platinum on each electrode.

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Discuss and explain the correlation between thirst and kidney function​
Pachacha [2.7K]

The correlation between thirst and kidney function is the following:

Thirst is the regulator of the state of hydration, necessary to eliminate the osmotic load, it can help preserve kidney function.

The instantaneous perception of osmolarity in the blood allows us to generate the sensation of thirst.

In other words, this sensation is in turn caused by a high concentration of osmolytes (compounds that affect osmosis, or the way it is measured, osmolality or osmolarity) or by hypovolemia.

The receptors that control cellular dehydration are called osmoreceptors and are located in the lateral preoptic area.

Osmoreceptors detect this decrease in cellular water and trigger thirst, as well as the release of Anti-Diuretic Hormone into the bloodstream.

Antidiuretic hormone helps regulate the amount of water in the body by controlling the amount of water excreted by the kidneys.

Therefore, we can conclude that the sensation of thirst appears the sodium concentration is higher than normal, when drinking water, the concentration gradient is reduced, which allows the normal functioning of kidney function.

Learn more here: brainly.com/question/6365240

3 0
3 years ago
Which process could be represented by the picture to the right? Mitosis, meiosis, fertilization, or pollination? Which cells are
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Which of the following hormones are synthesized in the cell bodies of neurosecretory cells found in the hypothalamus? Antidiuret
bixtya [17]

Answer:

Antidiuretic hormone

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Antidiuretic hormone that is synthesized and produced in the brain by the hypothalamus, is secreted from the pituitary gland, where it is stored. This hormone is released into the blood stream in response to changes in the water balance in the blood. This hormone helps the kidneys to control and regulate the amount of water in the blood

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3 years ago
According to the principle of stratigraphy, which layer in a rock formation would you expect to be the oldest?
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The base layer? i think
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