All Questions
32
questions
-3
votes
1
answer
68
views
Aqueous electrons in electrochemical cells [closed]
In the context of a zinc-copper electrochemical cell, zinc atoms at the anode are oxidized, releasing electrons and forming zinc ions that dissolve into the solution ($\ce{Zn(s) -> Zn^{2+}(aq) + 2e-...
- 1
-2
votes
2
answers
122
views
How do electrons travel through a fuel cell or flow battery with multiple cells?
I understand that if you have a fuel cell or flow battery with a single cell that electrons will go from the electrode and through an external circuit across the load which the fuel cell / flow ...
-2
votes
1
answer
48
views
Where does the ionisation energy for a reaction to take place comes from? [closed]
Can anyone tell me exactly what happens during a chemical reaction in terms of ionisation energy? I know that during a reaction there is an exchange of electrons (except for those where electrons are ...
2
votes
0
answers
60
views
Question about reaction in battery
I made a battery like this.
$\ce{(-)Al|HCl,CuSO4|Cu(+)}$
By piling up 6 battery of this(actually I made this using 10 yen and 1 yen coins:10yen coin is Cu and 1 yen coin is Al.) I could turn on an LED ...
- 677
-1
votes
2
answers
273
views
How is MnS + 2HCl -> MnCl2 + H2S a redox reaction, in terms of electron transfer?
$$\ce{MnS + 2HCl -> MnCl2 + H2S}$$
If oxidation and reduction is taken to be the loss of hydrogen and the gain of hydrogen respectively, then I can see how the aforementioned reaction is redox — $\...
- 193
22
votes
3
answers
2k
views
True or false: "A used AA battery contains fewer moles of electrons than a new AA battery."
I recently took a Gen. Chem. 2 exam that contained this question. I answered false, but my professor said the answer is true. My reasoning was that any electrons that leave the anode end up at the ...
- 449
7
votes
2
answers
4k
views
What are high-energy electrons?
I read that (in cellular respiration) the transported electrons in NADH have a higher energy than those in FADH2.
I can't find a (simple or otherwise) explanation of what a "high-energy" ...
- 267
0
votes
1
answer
781
views
How does the charge imbalance affect the cell reaction when there is no salt bridge in a galvanic cell?
As mentioned in the answers to this question Why is it important to use a salt bridge in a voltaic cell? Can a wire be used? a salt bridge is used to keep the two half cells neutral. i understand how ...
- 13
1
vote
0
answers
91
views
Equilibrium cell potential question
In an attempt to wrap my head around the basics of electrochemistry I'm working my way through Wesley R. Browne's 'Electrochemistry' primer.
With regards to the equilibrium potential of an ...
- 31
2
votes
0
answers
134
views
Is my understanding of cyclic voltammetry correct? [closed]
So recently I've been roped into doing some CV and I'm trying to wrap my head around the fundamentals of the science behind it (and electrochemistry more generally! Bare in mind I'm very much not an ...
- 31
-1
votes
1
answer
185
views
Predicting directions of redox reactions [closed]
Hello!
In this textbook example question, how come the chlorine reaction, which has the greatest reducing power will not react? If it has the greatest E of 1.36 V that means it has most reducing ...
- 197
-1
votes
1
answer
151
views
What do electrons usually do when lead acid battery is idle?
Lead acid batteries operation are governed by Redox reactions for charging and discharging. But, what do electrons usually do when lead acid battery is idle? And why?
Assumptions:
Say more ...
- 103
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 ...
8
votes
0
answers
392
views
What exactly is an "electron-sponge"?
What exactly an "electron-sponge" [behavior/action/property/system] nickname is, and what makes a material an "electron-sponge" (preferably, quantitatively)?
From what I found, it's typically a ...
- 38.4k
0
votes
3
answers
3k
views
Number of electrons transferred & Gibbs free energy
To determine the number of electrons transferred for the following reaction:
$$\ce{CH3OH + \frac{3}{2} O2 -> CO2 + 2 H2O}$$
I found the half reactions to be:
$$\text{Anode: } \ce{CH3OH + H2O -&...
