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Questions tagged [hydrogen]

Questions regarding the chemical properties of hydrogen and its behavior in reactions and compounds.

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Electrolysis of water with biocompatible electrolyte?

I want to perform electrolysis of water in a bacterial solution for production of hydrogen and oxygen. I am wondering what electrolytes could work best for this? The requirements are that the ...
Mark Zurbrügg's user avatar
2 votes
3 answers
984 views

Why only Balmer series of hydrogen spectrum is visible? [closed]

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 ...
Dhakshin Ram's user avatar
1 vote
1 answer
67 views

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 ...
Adhway's user avatar
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2 votes
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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 ...
mathemania's user avatar
4 votes
1 answer
95 views

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 ...
Bhavik Modi's user avatar
2 votes
0 answers
57 views

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-...
Metal Storm's user avatar
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5 votes
1 answer
584 views

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 ...
Ronith's user avatar
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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 (...
skm's user avatar
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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 ...
Doriano Brogioli's user avatar
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1 answer
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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 ...
Jane902's user avatar
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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 ...
STOI's user avatar
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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 ...
STOI's user avatar
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2 votes
1 answer
96 views

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 ...
Thomas's user avatar
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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 ...
Constnace's user avatar
-1 votes
1 answer
44 views

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 ...
JadeD's user avatar
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3 votes
1 answer
896 views

Why doesn't sodium bicarbonate dissolved in water spontaneously effervesce when carbonic acid does?

It's well known that if you put carbonic acid $\ce{H2CO3}$ into water it will dehydrate into carbon dioxide $\ce{CO2}$ and water $\ce{H2O}$. Indeed this is how modern fizzy drinks generate their fizz. ...
Hadi Khan's user avatar
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Self heating of Hydrogen

I have read that hydrogen can undergo self-heating, through a catalytic process, without the presence of oxygen or air. Is that true? I understand that this is not "burning" or "...
Jack's user avatar
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2 votes
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Reduction of benzylic alcohol and halide using H2 and Pd

I am studying drug synthesis, and I found some examples that uses $\ce{H_2}$ and Pd/C or Pd/$\ce{BaSO_4}$ as catalytic hydrogenation reagents for reduction of alcohol or halide in benzylic position. ...
Krang Lee's user avatar
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1 answer
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H-NMR Analysis of C15H24O

I was able to figure out that the structure of this compound was a benzene ring with 2 equivalent trimethyl groups to give the 18H singlet. Another non-equivalent methyl group to give the 3H singlet. ...
Mason's user avatar
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3 votes
1 answer
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Is size or electronegativity more important in acidity?

For the molecule below, is the hydrogen with the oxygen more acidic or is it the one with sulfur? Since both parts have the same number of resonance structures, I'm guessing it just boils down to ...
Max0815's user avatar
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1 answer
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Is it possible to make a reversible "Solid State" Hydrogen fuel cell using Ammonia Borane and Iron Oxide? [closed]

Well, I saw this video about hydrogen reduction, in which pure hydrogen gas is exposed to iron oxide at high temperatures, producing water vapor and leaving pure iron behind. And as such, I wondered ...
Fulano's user avatar
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0 answers
131 views

Why is tritium radioactive?

The nucleus of tritium (hydrogen-3, $\ce{^3H})$ contains one proton and two neutrons. Nothing repulsive is acting on the proton that can make the nucleus unstable. Then why does it decay? I suspect ...
KeShAw's user avatar
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What are disadvantages of methane or ammonia compared to dihydrogen for metal ore reduction?

Metallurgy, such as steel-making processes, require reducing agents to get rid of the oxygen in metal ores. Using fossil coal for this is a large source of $\ce{CO2}$ globally. Recently, I have read a ...
tobalt's user avatar
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1 answer
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Relationship of acids and bases with pH. (Proportional Relationship) [duplicate]

Can someone please clarify the relationship between acidic-basic strength and pH? I have come across conflicting information and am unsure about the correct understanding. Some people including my ...
Adarsh Gourab Mahalik's user avatar
2 votes
1 answer
203 views

How do the orbitals in atoms synchronize their phases during the formation of a bond?

Suppose I have two hydrogen atoms, each with one electron in their 1s orbital. Then we can represent the wave functions of these two as say $|\Psi\rangle_1$ and $|\Psi\rangle_2$ for each of the two ...
Hadi Khan's user avatar
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-3 votes
1 answer
65 views

Does Hydrogen Gas need to be bubbled in during Reduction of the electrode?

I have read in textbooks and websites that hydrogen gas needs to be bubbled into the SHE (Standard Hydrogen Electrode). I understand why for oxidation of the half cell - the gas is oxidised into H+ (...
Jay Chen's user avatar
5 votes
4 answers
963 views

Chemical Test for Hydrogen

I know that to perform a chemical test for $\ce{H2}$ we have to take a burning candle flame near to the mouth of the test tube and a blue flame with a characteristic pop sound confirms the presence of ...
Sarban Bhattacharya's user avatar
1 vote
3 answers
277 views

Is potassium Sulfate a good electrolyte for the production of oxy-hydrogen?

I am currently conducting an electrolysis experiment using a 30 amp power supply with a voltage ranging from 10 to 16 volts.I am thinking of using potassium sulfate (K2SO4) dissolved in water as an ...
Noah's user avatar
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4 votes
1 answer
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Ortho- Para- Hydrogen Names and Benzene

I read that the Hydrogen atoms with nuclear spin in same direction are called Ortho- Hydrogen whereas those in opposite nuclear spin are Para- Hydrogen. But is there any resemblance of such a ...
Sarban Bhattacharya's user avatar
1 vote
0 answers
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How do metal hydrides behave in a non-hydrogen closed system?

I am curious about the fundamentals of metal hydrides and how adsorption/desorption works in non-hydrogen systems. My understanding is that the atom ratio M/Hx of the metal hydride is a function of ...
dwgold9's user avatar
  • 11
-1 votes
1 answer
195 views

Why do H and Li bond so differently with a hydroxide?

I am sure I am asking a very basic question but before coming here, I have made multiple attempts to find an answer elsewhere. Or maybe I am simply asking the wrong question, in some sense. If someone ...
Sergey's user avatar
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3 votes
2 answers
374 views

Can molecular hydrogen form hydrogen bonds?

Basically, I want to know if molecular hydrogen (H$_2$) can form hydrogen bonds with other molecules (CH$_4$, CO$_2$, N$_2$). I'm trying to model the mixture of these molecules with SAFT equations of ...
felipe's user avatar
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3 votes
1 answer
52 views

Mystery GC peak appearing between 1H2 and various molecular combinations of 1H, 2H and 3H?

The following gas chromatograph, taken from "Review of the different techniques to analyse tritium", labels all but the largest peak. Given that the analyte is likely to be from some source ...
James Bowery's user avatar
1 vote
0 answers
38 views

Using Hydrogen as a carrier gas for a GC; consideration of reactivity with analytes

In many cases people use H2 as a carrier gas for a GC. But does this exclude analysis of (say) systems with unsaturation or aromatic compounds etc. If a analysis uses a temperature program say up to ...
curious_cat's user avatar
  • 1,638
1 vote
2 answers
143 views

Determining volume of hydrogen gas evolved in water splitting reaction

I want to carry out a photocatalytic water spliting reaction. This reaction will generate Hydrogen and Oxygen gas in 2:1 ratio according to the following reaction - 2H2O + energy (light) → 2H2 + O2 So,...
Abdullah Shahriar's user avatar
-5 votes
1 answer
1k views

How does hydrogen and oxygen combine to make water? [closed]

When two hydrogen atoms fuse with one oxygen atom to create a molecule of water, each hydrogen atom donates its single electron to the oxygen atom, resulting in 10 electrons for the oxygen, instead of ...
Terry Nixon's user avatar
1 vote
0 answers
88 views

Do PEM Fuel Cells suffer CO poisoning at the oxidizer side?

Reading about PEM Fuel Cells, first on Wikipedia then on some other sites, I notice they talk a lot about the problem of CO poisoning. But almost always it's explicitly referred to as a problem in ...
DrZ214's user avatar
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2 votes
2 answers
510 views

Difference between sodium aluminate and sodium metaaluminate

So I was studying Chemistry (Hydrogen - Uses, Properties and Preparation) from 2 different textbooks (based on Grade 9 syllabus, I.C.S.E. Board, India) and I found what seems an astounding anomaly to ...
Chinmay Krishna's user avatar
-2 votes
1 answer
158 views

Are hydrocarbons compounds of hydrogen and carbon, or carbon and hydrogen?

Is it the same to say "Hydrocarbons are compounds of hydrogen and carbon." as saying "Hydrocarbons are compounds of carbon and hydrogen." I got a B in my chemistry test just ...
Purpose's user avatar
  • 15
0 votes
0 answers
56 views

When hydrogen and oxygen reacts, what defines if it will turn into hydrogen peroxide or water?

If you have a jar with oxygen and hydrogen inside, I'm interested in knowing what variables are most important to ensure that the mixture will become water (if that was the goal) or hydrogen peroxide, ...
m-a-r-c-e-l-i-n-o's user avatar
-2 votes
1 answer
378 views

Average molecular distance between hydrogen gas [closed]

The whole question goes like this: Calculate the de Broglie wavelength of hydrogen molecule at 300K (Take the translational energy to be 1.5kT) Compare this to the average intermolecular spacing for ...
Sj2704's user avatar
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0 votes
0 answers
340 views

Can deuterium be separated from heavy water via electrolysis? It is an isotope of hydrogen, so I guess it should act in the same way?

I was wondering if it is possible to separate deuterium from heavy water via electrolysis. Also, is this the way deuterium gas is obtained on an industrial scale, or are there better methods?
Arbor Chetia's user avatar
0 votes
0 answers
47 views

How to calculate the solubility for the hydrogen concentration based on the pressure and temperature in the Metal Hydride Hydrogen compressors?

My name is Ketan Karkare and I am a student in the University. I am currently working on the metal hydride compression and have gone through the following paper: Mathematical modeling for the PCT ...
Ketan Karkare's user avatar
1 vote
2 answers
95 views

Titanium-free catalysts to decrease decomposition temperature of magnesium hydride

Magnesium hydride $(\ce{MgH2})$ is a metal hydride with a relatively stable structure, at least compared to other metal hydrides. Magnesium hydride splits at around 300 °C into magnesium and hydrogen. ...
user avatar
3 votes
1 answer
303 views

Has dilead hexahydride been synthesised?

Dilead hexahydride is listed on Wikipedia as a compound composed of two lead atoms, and six hydrogen atoms: H H | | H-Pb-Pb-H | | H H As the wikipedia ...
user avatar
-2 votes
1 answer
92 views

Confusion regarding classification of hydrides

According to my book,hydrides are classified as Ionic/Saltlike/Saline Hydrides, Covalent/Molecular Hydrides and Metallic/Non-stochiometric/Interstitial Hydrides. The explanation of my book is not very ...
Nipun Kulshreshtha's user avatar
3 votes
1 answer
184 views

Conditions for Pd/C reduction of alkene

I am trying to do a $\ce{H2}$ reduction of cyclic alkene (otherwise simple hydrocarbon with 1 methyl group along with the chain about the weakly-strained cycle) using $\ce{Pd/C}$, the cycloalkene ...
Greg's user avatar
  • 39
0 votes
0 answers
47 views

What material(s) can offer similar performance to polyurethane in a paint coating, but with less hydrogen?

We need to coat parts of an neutron instrument with a boron shielding coating. This currently is achieved using an airbrush gun with a paint mix of demineralized water, polyurethane and boron powder. ...
Stacker's user avatar
  • 39
-1 votes
2 answers
535 views

What will be the product of 1 eqv Benzene reacts with 1eqv H2? [closed]

how equivalent concept is applied in the above problem, Kindly help me out with the answer and proper explanation. As, I am getting confused in mole concept and equivalent concept here.
Amritendu Biswas's user avatar

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