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Waste Products from Hydrogen Fuel Cells

If the hydrogen burned in a hydrogen car is coming from a tank, the tank contains pure hydrogen, without any impurity, even in traces. The combustion produces pure water, without impurities. If the ...
Maurice's user avatar
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8 votes
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Chemical Test for Hydrogen

There are metals that promote the catalytic oxidation of hydrogen in air, such as platinum and palladium. While these are fairly expensive in bulk, there are reasonably inexpensive sensors which use ...
DrMoishe Pippik's user avatar
7 votes

Chemical Test for Hydrogen

I would be inclined to create two half-cells, the one a standard hydrogen electrode, and the other, the gas under test, connected with a narrow tube as recommended with the Standard Hydrogen Electrode ...
Stephen Elliott's user avatar
7 votes
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Why doesn't sodium bicarbonate dissolved in water spontaneously effervesce when carbonic acid does?

When sodium bicarbonate is dissolved in water, it produces $\ce{HCO3-}$ ions. These $\ce{HCO3-}$ ions can react with acidic ions in water, and produce some $\ce{CO2}$, as described in your question. ...
Maurice's user avatar
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6 votes
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Self heating of Hydrogen

Perhaps you're thinking of para-ortho conversion of hydrogen, which is certainly not combustion, but does release a bit of heat. Nuclei (e.e., protons) in a hydrogen molecule can have parallel or anti-...
DrMoishe Pippik's user avatar
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Is size or electronegativity more important in acidity?

The size is more significant and the thiocarboxylic acid would be more acidic. Whilst electro negativity facilitates the stabilisation of a negative charge, the larger size of the sulfur both: Makes ...
Kirandk's user avatar
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5 votes

What are disadvantages of methane or ammonia compared to dihydrogen for metal ore reduction?

Reactants in a solid state behave totally different from reactants in a gaseous state. And that is more than enough to limit the usefulness of hydrogen, or any hydrogen carrier such as methane or ...
Stian's user avatar
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5 votes

Why isn't protium nucleus considered most stable nucleus?

For the same reason why, in chemistry, a collection of identical separated atoms is unstable with respect to formation of chemical bonds, at low temperature. In nuclear physics, the "low ...
Paul Kolk's user avatar
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5 votes
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Deriving Nernst Equation for a hydrogen-oxygen Fuel cell

Rather than pointing whether the assumptions are correct or incorrect, I will show you a general method to obtain the Nernst's equation for any system. It is a more systematic and formal approach, ...
Metal Storm's user avatar
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4 votes

Chemical Test for Hydrogen

Small amounts of hydrogen can be tested by methods using electrochemistry, as illustrated in two answers above. Larger amounts, on the order of 50 - 100 mL, can be tested and identified by the unique ...
James Gaidis's user avatar
3 votes

Do solvated electrons short circuit the electrolysis of liquid ammonia

Solvated electrons do not always short-circuit the electrolytic process. In some processes the solvated electrons accumulate in the ammoniacal medium instead, particularly if the anode which supplies ...
Oscar Lanzi's user avatar
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2 votes

Have IH₃ and IH₅ already been synthesized?

Not the specific compounds $\ce{IH3}$ and $\ce{IH5}$, but hydrogen-iodine compounds with nonclassical stoichiometriws have been synthesized under high pressure. Binns et al[1] report two high-pressure,...
Oscar Lanzi's user avatar
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2 votes

What are disadvantages of methane or ammonia compared to dihydrogen for metal ore reduction?

Chemists would not use either $\ce{CH4}$ either $\ce{NH3}$ in the first place. Their true acting reducing agent is hydrogen again. But it would have to be formed first. The partial hydrogen pressure ...
Poutnik's user avatar
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Does Hydrogen Gas need to be bubbled in during Reduction of the electrode?

The SHE is not used as a working electrode with passing current, it would affect its potential. It is used as the third, reference electrode with negligible current. The potentials of the working ...
Poutnik's user avatar
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2 votes
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Is it possible to make a reversible "Solid State" Hydrogen fuel cell using Ammonia Borane and Iron Oxide?

The answer to your original question is no. An iron oxide-ammonia borane fuel cell will not work because the reaction is endothermic. I'll go into a bit more detail though. ChatGPT gave you its usual ...
anon's user avatar
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2 votes
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Calculation of Kc

Let: A = $\ce{H2}$ B = $\ce{I2}$ C = $\ce{HI}$ At equilibrium: $$C_A=1-x$$ $$C_B=1-x$$ $$C_C=2x=1.5\implies x=0.75$$ Calculating $K_c$: $$K_c=\frac{C_C^2}{C_AC_B}=\frac{\left(2x\right)^2}{\left(1-x\...
Sam202's user avatar
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1 vote
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Resolve inconsistency regarding percentage of ionized water molecules in the auto-ionization of water

I believe OP's confusion is related to the difference between the equilibrium constant in terms of concentration $K_c$ and modified equilibrium constant forms that derive from $K_c$ multiplied by a ...
Sam202's user avatar
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1 vote

H-NMR Analysis of C15H24O

This is a good fit for 2,6-di-tert-butyl-4-methylphenol. See the 1H spectrum here
Waylander's user avatar
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1 vote

Hydrogen Peroxide 60% Dilution

Send the peroxide for destruction! You are clearly not equipped for this with either competence or actual equipment. You cannot store this safely in your home. It autodecomposes and the stronger and ...
Stian's user avatar
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1 vote

Solubility of hydrogen

If hydrogen $\ce{H2}$ is an end product in solution, it will soon produce gas bubbles, as the solubility of hydrogen is low : $\pu{1.5 10^{-4}}$ g in $100$ mL at room temperature. This is not affected ...
Maurice's user avatar
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1 vote

Chemical Test for Hydrogen

There is a recent article in J Chem Edu (https://doi.org/10.1021/acs.jchemed.3c00129 ) that describes an assay based on Pd-catalyzed reduction of organic dyes (methylene blue or thionine). The ...
Karsten's user avatar
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1 vote

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

As peroxosulfates/peroxodisulfates ($\ce{SO5^2-}$, $\ce{S2O8^2-}$) are assumed to be created roughly at $U \ge \pu{2.4 V}$, do not raise the applied voltage above $2.0 - 2.1 \pu{V}$. To increase the ...
Poutnik's user avatar
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