Questions tagged [hydrogen]
Questions regarding the chemical properties of hydrogen and its behavior in reactions and compounds.
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Why only Balmer series of hydrogen spectrum is visible?
When I was reading about the hydrogen spectrum, I came across the statement:
Only Balmer series of hydrogen spectrum can be visible to our eyes.
I really got surprised by that. Why can't other ...
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Mechanism of Zn + NaOH?
I was reading block chemistry in class, and I was taught by my chemistry professor this method of preparation of hydrogen:
$\ce{Zn + NaOH -> Na2ZnO2 + H2}$
In this reaction, zinc reacts with ...
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Sensitivity of CoSi2 to hydrogen
It is known that palladium is quite sensitive to hydrogen, i.e., has an extraordinary ability to absorb hydrogen. I was reading a paper that talks about the fabrication of a Pd based sensor for ...
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Why is my Ni or Fe cathode blackening and pores getting blocked during alkaline (6 M KOH) electrolysis?
I am conducting an electrolysis process for hydrogen $(\ce{H2})$ and oxygen $(\ce{O2})$ generation using a $\pu{6 M}$ $\ce{KOH}$ alkaline solution.
During the process, I have observed that my cathode ...
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Why is the translational motion left out of the energy eigenvalue in the hydrogen atom?
When solving the hydrogen atom, since we have two particles, the wave function has the form $\psi(\mathbf{q}_1,\mathbf{q}_2)$. Generally, textbooks proceed to demonstrate that an interacting two-...
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Waste Products from Hydrogen Fuel Cells
I was recently reading this article by BMW, that said
The exhaust air of a hydrogen car consists of pure water vapor. The fuel cell drive is therefore locally emission-free. This means it keeps the ...
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How many neutrons could a hydrogen atom hold?
Usually a hydrogen atom consists of no neutrons; however many exotic hydrogen isotopes have been synthesized. Deuterium and tritium are some of the more 'common' isotopes; nevertheless, Wikipedia's ...
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Resolve inconsistency regarding percentage of ionized water molecules in the auto-ionization of water
I am relearning some chemistry in order to understand pH for a particular application. My last encounter with the subject was in high school several decades ago. I have the following question:
I read (...
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Devanathan / Stachurski cell, hydrogen permeation in palladium
The cell mentioned in the title is a couple of electrochemical cells separated by a metal diaphragm. On the surface of the diaphragm, on one side, hydrogen is evolved. The amount that permeates is ...
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Calculation of Kc
Gaseous hydrogen and gaseous iodine react together to form hydrogen iodide.
H2 + I2 ⇌ 2HI
The graph shows how the amount of hydrogen iodide varies with time in a 1.00 dm3
container.
The initial ...
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Deriving Nernst Equation for a hydrogen-oxygen Fuel cell
Reading across electrochemistry books (particularly the fuel cells chapter of the book "Alternative energy systems and applications" by Hodge) I came across the following formulae:
$$\Delta ...
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Simple Calculation of Potentials for a hydrogen-oxygen Fuel cell, unexpected results from book example
I am reading "Alternative energy systems" by Hodge.
On the fuel cell section, the author has an example for calculating the potential required for the fuel cell as a function of temperature ...
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Do solvated electrons short circuit the electrolysis of liquid ammonia
If attempting the electrolysis of liquid ammonia using NaNH2 as an electrolyte. It is understood that Na+ will form solvated electrons. I understand that these solvated electrons can dramatically ...
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Hydrogen Peroxide 60% Dilution [closed]
Can anyone please help me? I have used various 'dilution' calculators' online, and done the equations on paper. However I DO NOT want to get this wrong and one can be great at math, but help and ...
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Solubility of hydrogen
I'm interested in bacterial fermentation which produces molecular hydrogen as an end product. If bacteria produce molecular hydrogen in solution under anaerobic conditions, does this remain dissolved ...
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