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1 vote

Calculation of Reaction Extent as a Function of Pressure and Temperature: Issue with Activity-Based Approach

Since you asked for general assistance and I have dealt with these type of calculations, I will give you some general points as the question evolved these last days: The expression for the activity ...
Metal Storm's user avatar
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0 votes

Questions on protonation / substituent effects on the energies of HOMO and LUMO

The energy of molecular orbitals is strongly correlated to the length of the bonds and the electronegativity of the atoms involved. The energy of bonding molecular orbitals decreases as bond length ...
GabrielAlx's user avatar
2 votes
Accepted

1-Bromo-4-tert-butylbenzene reaction with NaNH2

The reaction will proceed by deprotonation of the benzene ring to give the benzyne, an unstable intermediate, which then will react with ammonia/amide anion to give a mixture of m and p t-butyl ...
Waylander's user avatar
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3 votes

Why are we permitted to add things to balance redox equations?

We add water molecules because most reactions tend to happen in aqueous solutions. As for whether to add $H^+$ or $OH^-$ ions depends on the pH of the reaction mixture. For permanganate oxidations; $$\...
BK01's user avatar
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3 votes

Why are we permitted to add things to balance redox equations?

You can "add electrons, water, hydrogen ions or hydroxide ions to balance the redox half equation" only when the reaction occurs in water. That means that lots of water molecules are always ...
Ilmari Karonen's user avatar
4 votes

Why are we permitted to add things to balance redox equations?

By adding anything, you just remove one of several fundamental inequalities in the equation. A chemical equation is formally nothing else but a very specific syntax for a set of linear algebraic ...
Poutnik's user avatar
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1 vote

What is the full mechanism for the controlled reduction of an alkyne using LiAlH₄?

The last step represents the hydrolysis of the organometallic ring aduct during the acidic work-up of the reaction. This hydrolysis might proceed via deprotonation of a water molecule (or hydronium ...
JpNog19's user avatar
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9 votes
Accepted

Does the acetic acid in vinegar oxidize significantly?

It's unlikely bottle shrinkage was due to a chemical change. Plastics are surprisingly permeable to water vapor, far more than to air! In data at Versaperm, Polyethylene (PE) and polypropylene (PP), ...
DrMoishe Pippik's user avatar
1 vote

Mechanism of reaction of alcohol with NaBr + H2SO4

A highly important fact is that any sodium halide + acid produces hydrogen halide (gaseous) which dissolves in water to form hydrohalic acid. $$\ce{2Na\color{green}{X}_{(s)} + H2SO4_{(aq)} -> ...
Harikrishnan M's user avatar
1 vote
Accepted

Question about regioselectivity depending on the base used

The reason for this is because t-BuO is more hindered than EtO-. So as you might have studied during deprotonation, if a bulky base is removing the Hydrogen cation, it will not be stable if the proton ...
Satyam Shankar's user avatar
0 votes

Why NaOH(s,l) + CO2(g) → Na2CO3(s)? Why not NaOH(g) + CO2(g) → Na2CO3(g)?

Your equation implies bot $\ce{NaOH}$ and $\ce{Na2CO3}$ have to be the gas state. Well! It is hard to obtain. $\ce{NaOH}$ is gaseous at temperatures above $1500$°C. And $\ce{Na2CO3}$ does not exist in ...
Maurice's user avatar
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0 votes
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Will a reaction happen slower if it has a higher enthalpy change than its counterparts?

In Diagram A, one puts in X amount of energy to get "over the hump", and, as the reaction completes, gets out somewhat less than X. That means one has to continually feed in energy to keep ...
DrMoishe Pippik's user avatar

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