All Questions
Tagged with equilibrium redox
33
questions
23
votes
2
answers
5k
views
Why don't everyday things burn?
Ok, so I learned about the equilibrium constant. Now, I've seen that the equilibrium constant of burning is extremely small $(K \ll 1)$. here, I have a question. you see, $K$ is still NOT 0, which ...
- 411
10
votes
2
answers
4k
views
Why is chromate stable in basic medium and dichromate stable in acidic medium?
When I was studying the equilibrium existing between chromate and dichromate ions in the solution, I came to know that
Chromate ion is more stable in basic medium while dichromate ion is stable in ...
- 797
7
votes
1
answer
217
views
Are redox half-reactions "real"?
Are the half-reactions used in analyzing redox reactions a real thing or are they a conceptual shortcut?
Is there a way to, however briefly, run a half-reaction by itself without the corresponding ...
- 71
6
votes
2
answers
1k
views
Balancing complex haloform redox reaction
I just completed a haloform reaction experiment, using acetophenone and sodium hypochlorite to form benzoic acid and chloroform.
My lab report has a question regarding balancing the equation of the ...
- 61
4
votes
1
answer
120
views
Redox titration, complex formation effect on lg'K?
We have performed the following redox titration
(1): $\ce{MnO_4^- + 8H^+ + 5Fe^2+ <=> Mn^2+ + 4H_2O + 5Fe^3+}$
where we have used a iron(II)solution (the analyte) and titrated it with a ...
- 43
4
votes
2
answers
804
views
Acid dissociation constant from conductometric data
$\ce{0.007 M}$ aq. solution of anilinium hydrochloride had molar conductivity equal to $\pu{119.4 S cm2 mol-1}$, which became $\pu{103 S cm2 mol-1}$ when a few drops of aniline were added to the ...
- 828
3
votes
1
answer
317
views
How can batteries reach equilibrium if the reactions are irreversible?
My book says that the batteries we have considered so far (Daniell cells) have a low life span because they reach equilibrium too quickly.
In the next paragraph, it states they are also made by ...
- 77
3
votes
1
answer
189
views
Are my intuitions about how batteries work right? [closed]
Being really fascinated by how electricity actually works, I started studying batteries.
I initilally understimated the complexity of this apparently-simple objects, and thorugh studies and researches ...
2
votes
1
answer
318
views
Relation between standard silver-silver chloride electrode potential and solubility product of silver chloride
I learned that $E^\circ_\ce{Cl^-|Ag,AgCl}, E^\circ_\ce{Ag^+|Ag}$ and $K_\mathrm{sp}$ of $\ce{AgCl}$ are related as
$$\boxed{E^\circ_\ce{Cl^-|Ag,AgCl} = E^\circ_\ce{Ag^+|Ag} + \frac{RT}{F}\ln K_\mathrm{...
- 750
2
votes
1
answer
3k
views
Is there a database which give reaction constant?
For instance, I have a chemical reaction like :
$$\ce{Fe^{2+} + $0.5$O2 + H^{+} ->Fe^{3+} + $0.5$ H2O}$$
And I would like to use Action-Mass law, but I need to have equilibrium constant for this ...
- 133
2
votes
3
answers
2k
views
Why is the voltage produced by a voltaic cell affected by temperature as described by the Nernst Equation?
I understand why changing the concentrations of the electrolytes in a voltaic cell affects the voltage. Given a zinc-copper cell for example, if I were to increase the concentration of the zinc ...
- 71
2
votes
1
answer
4k
views
Does a Na2SO3 solution oxidize to Na2SO4 in an oxygen rich atmosphere?
Let's assume I have a pure solution of water and $\ce{NaOH}$. When this solution comes in contact with an atmoshpere containing inert gases and $\ce{SO2}$, then $\ce{NaHSO3}$ and $\ce{Na2SO3}$ will be ...
- 21
2
votes
2
answers
2k
views
Origin of electrode potential and its connection with electric double layer
Recently, I was learning about electrode processes and I came across the topic of "electrode potentials".
I understood that at equilibrium, a potential difference was generated at the ...
- 221
2
votes
0
answers
41
views
Do decomposition potentials change during electrolysis?
I was just wondering if decomposition potentials actually change during electrolysis. For example, if we reversed the Daniell cell reaction so that copper is oxidized, the half cell reactions would be:...
user115162
1
vote
1
answer
98
views
What would be the concentration of products in this calcium producing system?
I wanted to figure out a way to make calcium metal with potassium oxide. $\ce{K2O}$ undergoes disproportionation at $\pu{350-430 °C}:$
$$\ce{2 K2O -> K2O2 + 2 K}$$
Now, if I mixed in $\ce{CaO}$ (...
- 1,480