All Questions
12
questions
-1
votes
1
answer
134
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Can use lead(II) oxide instead of lead(IV) oxide in car battery?
Question: If the discharge input equation $\ce{PbO2}$ is replaced by $\ce{PbO}$, will the battery still work? I think the product will not be water anymore but hydrogen gas. I am asking this question ...
- 11
0
votes
1
answer
783
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
0
votes
1
answer
3k
views
Why oxidation potential of an electrode equals negative reduction potential of the same electrode?
My textbook states that:
$E^\circ_\mathrm{ox} = -E^\circ_\mathrm{red}$ (of same electrode)
I know that electrons flow from anode half cell (oxidation) to cathode half cell (reduction).
But if $E^\...
- 143
7
votes
4
answers
3k
views
How can a neutral atom attract electrons when it's supposed to have zero charge?
A neutral atom is an atom with an equal number of protons and electrons
We know the force of attraction between the proton and electron is equal
and assuming that:
one proton's positive charge ...
- 639
-1
votes
1
answer
95
views
Why electrons move to Cu in galvanic cells?
I'm student who learning about chemistry, and I got problem about understanding why electorns move to Cu in galvanic cells.
Let's think the reason for electrons going to Cu is that the standard ...
- 9
3
votes
0
answers
316
views
Why do electrons not flow through the electrolyte? [duplicate]
Why do the electrons not flow through the electrolyte instead of the external circuit in a electrolytic cell connected to an external circuit? I mean, if an electrolyte is a conductor why would the ...
- 139
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
2
answers
2k
views
Why does copper form bubbles in vinegar in this situation?
I watched this video in which the host tries to show the principles behind the voltaic pile.
The host first immersed zinc in vinegar and bubbles are observed forming around zinc. I've learned that ...
5
votes
2
answers
22k
views
Explanation for the reactions in a saltwater battery with zinc and copper electrodes
I am a physicist, not a chemist. I'm trying to get a basic understanding of the reactions taking place in a battery using a saltwater electrolyte with copper and zinc terminals. I'm writing a general ...
- 151
7
votes
1
answer
392
views
Prediction of ionic reduction?
Here are some standard electrode potentials:-
$$\ce{SO_4^{2-} + 4H^+ + 2e^- -> SO_2 + 2H_2O}\\E^o=0.17\mathrm{V}\\
\ce{NO_3^- + 4H^+ + 3e^- -> NO + 2H_2O}\\E^o=0.97\mathrm{V}\\
\ce{NO_3^- + ...
- 6,795
57
votes
4
answers
385k
views
Why is it important to use a salt bridge in a voltaic cell? Can a wire be used?
I was learning about voltaic cells and came across salt bridges. If the purpose of the salt bridge is only to move electrons from an electrolyte solution to the other, then why can I not use a wire?
...
- 799
37
votes
5
answers
20k
views
Why don't the electrons move through the electrolyte (instead of the circuit) in a galvanic cell?
I was learning about galvanic cells and I had a problem understanding why electrons do not travel through the electrolyte solutions themselves, instead preferring to travel through metals. Can ...
- 483