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

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6
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1answer
39 views

In cracking, why does C form double bonds?

I've been reading about cracking and I've found various images and animations that show a process like this: But I haven't been able to find out the sequence of events to get to this, and why this ...
3
votes
1answer
107 views

Reduce chlorine gas

I have a simple electrolysis setup which uses aqueous sodium chloride as electrolyte. The problem is that, the setup makes tons of chlorine gas along with hydrogen (I only want hydrogen). I didn't ...
2
votes
2answers
72 views

Hydrogenation stereochemistry-Pd,Pt, Ni catalysts

When my textbook talks about hydrogenation using Pt, Pd or Ni heterogeneous catalysts, it never mentions if it is anti or syn addition. It simply jumps on to say that for alkynes, NiB2 (P-2) catalysts ...
1
vote
1answer
62 views

What are possible side reactions for the generation of hydrogen via electrolysis?

I recently completed making a simple water electrolysis setup to generate hydrogen which uses two graphite rods from a standard AA battery. The power source is a $24~\mathrm{V}$ $6~\mathrm{A}$ ...
3
votes
1answer
31 views

Reaction of distilled water with hard water

This question seems silly, but this just came in my mind while i was learning Hydrogen. Means will there be any reaction when $\ce{H2O}$will react with $\ce{D2O}$..
1
vote
1answer
23 views

How much water would one loose if one burns hydrogen and oxygen?

By using electrolysis one can separate hydrogen and oxygen, but when burning hydrogen and oxygen together steam is released, therefore creating water. My question is: how much of the original ...
2
votes
3answers
198 views

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?
6
votes
1answer
38 views

Reaction mechanism of combustion of H2?

After a discussion about the usefulness of hydrogen fuel for cars with a friend of mine, I wondered what the reaction mechanism for combustion of $\ce{H}_2$ was. I only study (well almost) organic ...
2
votes
1answer
34 views

Can electrolyzing ice cause an explosion?

I know electrolyzing water separates it into hydrogen and oxygen. However, I am curious, if ice is electrolyzed, could it explode? My thought process is that oxygen and hydrogen bubbles would build ...
3
votes
1answer
56 views

Intermolecular Hydrogen Bonding

I learnt about intermolecular hydrogen bonding today, which occurs between molecules such as ortho-nitro-phenol. What I was told is that in case of intermolecular bonding, the molecules separate from ...
2
votes
1answer
27 views

Hydrogen atom energy level

The energy level of a hydrogen atom in its ground state is $-13.6eV$. How is this value calculated and how can we calculate the same for different orbits?
3
votes
2answers
54 views

What's the Acid Ionization Constant of the Hydrogen Proton?

What is the $\ce{K_{a}}$ value for $\ce{H^+}$. I understand that the hydrogen proton doesn't stick around in solution by itself for very long. Nonetheless, does it have a $\ce{K_{a}}$ value? Can it ...
2
votes
1answer
175 views

Why does the Schroedinger equation for hydrogen atom look like this?

Here is how I saw the Hamiltonian being written in one Quantum Mechanics book: Well, That's all very nice and complicated, but looking at the last term, and seeing the use of $r$ in there, ...
0
votes
2answers
60 views

Hydrogen suspended in the center of an aromatic ring and NMR

My textbook (Organic Chemistry, 2nd Ed. Hornback, Joseph) states that if a hydrogen is located near the center of an aromatic ring it will experience an (often quite sizable) upfield shift, as seen in ...
0
votes
2answers
35 views

Identifying protons in NMR using the J values

When looking over an old organic midterm I came across this question. As you can see I got half of it right, but honestly I'm not sure how I got that one right or how you would answer this in ...
2
votes
2answers
120 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
votes
2answers
83 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
170 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
787 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 $\ce{H2O}$ ...
2
votes
1answer
48 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 ...
6
votes
4answers
961 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
3answers
150 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 ...
2
votes
1answer
94 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
163 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 ...
4
votes
2answers
115 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
166 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 ...
6
votes
1answer
291 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
179 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 ...
1
vote
2answers
271 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
69 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 ...
3
votes
2answers
4k 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
2k 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 ...
2
votes
3answers
528 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
3
votes
3answers
117 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
3
votes
2answers
199 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 ...
7
votes
1answer
1k 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
108 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: ...
3
votes
1answer
316 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
166 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
102 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 ...
20
votes
1answer
308 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
7k 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 ...
3
votes
1answer
976 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
262 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
448 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 ...
11
votes
2answers
565 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 ...