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

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2
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2answers
64 views

Are all (pure) alkanes, alkenes and alkynes - tasteless, odourless and colourless? [closed]

non-pure alkanes, .. have a taste .. (as far as I know, is it wrong or true?) but .. Are all pure alkanes, .. tasteless ..?
0
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2answers
49 views

Can a hydrocarbon organic compound contain an ionic bond? [closed]

Can hydrocarbon organic compounds have a type of bonds other than covalent bonds?
2
votes
1answer
81 views

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 ...
4
votes
1answer
360 views

Rate and mechanism of the reaction of Mg and HCl

In the reaction between hydrochloric acid and Magnesium the overall reaction is: $$\ce{Mg + 2HCl -> MgCl2 + H2}$$ My proposed mechanism of reaction is that $\ce{HCl}$ dissociates in $\ce{H2O}$ ...
1
vote
1answer
35 views

Could this be a feasible fuel system?

First off, please forgive me, I am a chemistry novice! Overall Process Fuel for the system is distilled water Split water into Hydrogen and Oxygen (electrolysis or similar process) Exhaust Oxygen ...
3
votes
4answers
326 views

How explosive is hydrogen gas?

I want to electrolyze water to get oxygen and hydrogen. I want to mix them in a regular balloon and ignite it. How much hydrogen would you need in a 2:1 ratio with air for it to be dangerous? Is this ...
0
votes
1answer
95 views

How to design an electrochemical reactor for the production of chlorine and hydrogen? [closed]

For my university design project, I have to design an electrochemical reactor to electrolyse brine and sodium hydroxide solution to produce hydrogen and chlorine. I have the chemical equations and ...
0
votes
2answers
42 views

Lifetime of a (reversible) hydrogen fuel cell system

I am trying to determine how long a system that constantly converts water into H and O and then back will last, as in roughly how many cycles. Now this system can either be made of say a reversible ...
0
votes
1answer
61 views

Why platinum used as a catalyst in fuel cell electrodes (and elsewhere)?

I have rather basic knowledge of chemistry (at the level of a first year college class). But maybe somebody can still clarify with some simple words: What makes platinum a good catalyst for the ...
1
vote
1answer
94 views

How do I calculate the change in energy of an electron transition?

What are the $\Delta E$'s of the transitions of an electron from $n=5$ to $n=1$ and from $n=5$ to $n=2$ in a Bohr hydrogen atom? The wavelength of the first electron transition is ...
3
votes
2answers
84 views

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 ...
1
vote
1answer
153 views

The ionization energy of $\ce{H2^+}$ molecule ion

I am trying to compute the ionization energy of $H_2^+$ molecule ion from the electronic energy spectrum. The question is whether one should use the purely electronic Hamiltonian or the Hamiltonian ...
5
votes
2answers
216 views

Can 1 mole of H2 react partially with one mole of O2?

I am currently studying stoichiometry (high school level) and we came across the following equation in school: $\ce{2H2 + 1O2 -> 2H2O}$ which is clear to me. We learned in school that reactions ...
5
votes
2answers
158 views

Is real water made up of heavy water and light water?

I need to know, is real water made up of heavy water which is formed with deuterium, and light water which is water by protium? We know that hydrogen has three major isotopes, including protium and ...
0
votes
0answers
176 views

Is it dangerous to inhale the steam coming from electrolysis of salt-water solution

Is chlorine in there that accumulates (at the anode) and emerge out as chlorine gas? I was worried since I added a pinch of salt to the steamer inorder to hasten the heating of tap water when I caught ...
0
votes
1answer
62 views

Why do batteries specifically vent *hydrogen* in the event of abuse?

When a battery is subject to overcharging or overdischarging (including attempts to recharge a primary cell), it may vent hydrogen. It seems that every type of electrochemical battery I've read about ...
2
votes
2answers
3k views

Iron Nail and Vinegar experiment

I have submerged a iron nail in vinegar twice recently. What is puzzling me is the different results each time. The first time I submerged it, it was covered in rust. When I put it in the solution of ...
3
votes
2answers
1k views

Why are there multiple lines in hydrogen line spectrum

Hydrogen has only one electron, yet the line spectrum of hydrogen has multiple lines. Why is this?
6
votes
2answers
2k views

What exactly is Hydrogen bonding (and why can't it exist with atoms other than Fluorine, Oxygen, Nitrogen)?

I'm not satisfied with the rationale for the intermolecular attraction known as hydrogen bonding. In my book, it states that Hydrogen bonding is a special type of intermolecular attraction ...
0
votes
3answers
296 views

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
2
votes
3answers
96 views

Can natural gas appliances run on Hydrogen?

Can natural gas appliances run on Hydrogen? If so, does the appliance have to be modified and how significant of a modification would it need? Thanks
2
votes
2answers
161 views

Finding Pv in Pv=nRT for molecular hydrogen

I'm attempting to write a small program that will calculate the values for the Ideal Gas Law, specifically for molecular Hydrogen (H2) in space. Eventually, this will grow to be a sort of ...
4
votes
1answer
948 views

If electrolysis splits water, why does only either hydrogen or oxygen (but not both) bubble up on one pole?

If electrolysis splits water, then that means that $\ce{H2O}$ is split into $\ce{H}$ and $\ce{OH}$ or $\ce{O}$. How come that if a water molecule is split at e.g. the negative pole (anode), only the ...
0
votes
2answers
96 views

How to find the molecular weight of a given gas?

It's given that the density of a gas(X) is 10 times that of hydrogen. In that case, what is the molecular weight of gas X? Well what I've done up to now is this: ...
2
votes
1answer
266 views

Delta G for Standard Hydrogen Electrode reaction

I'm dealing with electrochemistry problems. For the following reaction $$2H^+ + 2e^- \leftrightarrow H_2 \ \ \ \ \ \ \ E^o= 0 \ V$$ Does it make sense to say $$\Delta G^o=-nFE^o = 0 $$ Which would ...
2
votes
2answers
143 views

Palladium hydride forming water and heat at room temperature

I just read that saturated palladium hydride, $\ce{PdH}$0.7, when exposed to oxygen will generate heat and water on it's surface, $\ce{4 H}$(Pd) $\ce{+O2}$(g) $\ce{\to 2 H2O}$(g, l). What is going ...
2
votes
1answer
98 views

Hund's rule & different $H_2$ molecules

Does Hund's rule allow both of the following scenarios? Filling each orbital with a single electron, so that a sub-shell, at first, only electrons with a negative spin Filling each orbital with a ...
19
votes
1answer
276 views

How does Palladium dissociate H₂ so easily?

If I understand correctly, H2 in the presence of Pd readily dissociates as it dissolves into the metal. With the dissociation energy for the H—H bond being so large, how is this possible? At first I ...
4
votes
2answers
5k views

Why does the hydroxide ion have a negative charge?

I've been studying the roles of hydroxide & hydronium in acids and bases, and it was mentioned that a hydroxide ion (OH-) has a negative charge. Can someone give me a layman's explanation of what ...
2
votes
1answer
820 views

Samsung's S-Plasma Ion - scientific basis

Has anyone come across a scientific study of the S-Plasma Ions that Samsung claims will purify air from microbes, allergens and free radicals? I would prefer publicly available research findings. The ...
7
votes
1answer
229 views

Are there any examples of nuclear spin isomers having consequences for chemical reactivity?

Ortho- and parahydrogen are two forms of the $\ce{H2}$ molecule that are distinguished by their pairing or antipairing of nuclear spins, giving rise to metastable singlet (ortho-) and triplet (para-) ...
9
votes
2answers
404 views

Why is slush hydrogen at the triple point?

Slush hydrogen is a mixture of liquid and solid hydrogen at the triple point considered as a possible vehicle fuel. What is the need of having it at the triple point? Couldn't any other set of ...
10
votes
1answer
378 views

Why are there two Hydrogen atoms on some periodic tables?

Most periodic tables only feature one Hydrogen atom, on the top of the first group. But some, like the one I was given, also show Hydrogen in the 7th group, to left of Helium. Why are there two ...