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Questions tagged [hydrogen]

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

348 questions
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Hydrogen venting: Why no flame arrestors?

I was reading the guidelines for safe venting of Hydrogen. One item says "no flame arrestors". Just wondering the scientific reason why flame arrestors may be frowned upon when for venting of most other flammable vapors / gases flame arrestors seem…
curious_cat
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Will compressed hydrogen float in air?

Imagine a container of fixed volume is taken and hydrogen gas is filled in it, as a result the container floats in air. But if in the same container is filled with so much hydrogen that the hydrogen gas molecules had to compress to fit in the…
Kazi Lotus
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Removing hydrogen bubbles by reacting them away

I have a microfluidics problem where hydrogen is forming tiny (nanometer-scale) bubbles which cause problems. The hydrogen is a reaction byproduct that comes from n etch between silicon and TMAH. The bubbles essentially cause etch masking. We are…
BetterSense
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Hydrogen as a fuel really worth it?

Is hydrogen good to be used in cars? How much of traveling can a car do with medium sized balloon filled with hydrogen? Is it worth it?
user7063
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Is water a possible fuel for jet engines?

Jet engines can run on almost any fuel, and the operating temperatures of modern jet engines' hottest sections are anywhere between 3000 and 3150 degrees F (1648 and 1732 degrees Celsius). Does that mean that a hydrogen on-demand system could work…
securitydude5
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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 nomenclature with Ortho- Meta- Para- of Benzene, cause…
Sarban Bhattacharya
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Question on Hydrogen Balloon

I tried to extract hydrogen for my kid's birthday, by mixing caustic soda with water and aluminum foil (mixed in a glass bottle). A lot of heat and (hopefully)hydrogen was released. However, within 2-3 hours, the balloons started losing altitude and…
Mat
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How does malachite react with acid?

I performed an experiment where I did this: Add one spatula of malachite to a test tube, add dilute hydrochloric acid to the malachite until the test tube is one third full. Note observations and identify gas produced. The green solid turned to a…
Turbo
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Reduction of copper oxide by hydrogen in the lab

Why does the hydrogen which is passing continuously through the tube have to be burnt when it is passing out from the tube? Why can it not be allowed to just escape simply?
bija
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Can a spark ignite hydrogen?

Can a spark ignite hydrogen? Also, what about the tip of a cigarette? I've heard that hydrogen is very explosive. Thanks
wayofthefuture
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How to calculate the magnitude of magnetic field of an orbital?

I read that according to QM the electron in the ground state orbital produces no magnetic field, if that is true, can you explain why so and in what states there is a magnetic field and how that is produced? Why the difference? Anyway, I am…
user36543
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What happen to the Salt in Water Electrolysis

I haven't found yet what happen to the Salt Ions in Water during Electrolysis and is there an Electron Flow or Ion Flow. I have expierienced strong magnetic Forces between the Electrodes but couldnt measure an outside Magnetic Field.
helmut5230
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Is there a non-violent, practical way of making hydrochloride with only Hydrogen and Chlorine?

A way of making HCl gas is to put Chlorine and Hydrogen into a test tube and expose it to UV light. This reaction is however fast and strong and I would like to store the Hydrochloride from it. Another way would be to dissolve Chlorine in water,…
John K
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Hydrogen atom energy level

The energy level of a hydrogen atom in its ground state is $-13.6\ \mathrm{eV}$. How is this value calculated and how can we calculate the same for different orbits?
Adarsh
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Hydrogen storage using activated carbons

On Wikipedia, a possibility of using activated carbons to store hydrogen is reported. According to the Wikipedia page, this solution can be used to store around 5 wt% by cooling down the hydrogen to -196$\;^\circ$C at 1 bar. I am wondering if the…
Mokus
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