All Questions
Tagged with electrons electricity
16
questions
-3
votes
1
answer
79
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Does the cathode always attain a positive charge or is it just a convention?
Suppose I have a galvanic cell composed of two half cells, one containing Zinc electrode dipped in an electrolytic solution (say of ZnSO4) while the another one having Lithium electrode dipped in ...
0
votes
2
answers
85
views
Fundamental understanding of electrode potentials
The electrical double layer, is commonly used to describe the origins of electric potentials that is fundamental to electrochemistry. This model is quite outdated from my understanding, but it is ...
- 95
-1
votes
1
answer
143
views
Why does lead gains electrons in the cathode? [closed]
In lead(II) bromide electrolysis, lead is attracted to the cathode and gains electrons. Why does it gain electrons when losing them would be easier since its charge is +2 meaning it would need to lose ...
- 1
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
0
votes
1
answer
93
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Hydrated electrons produced by radiation vs electrons from electrostatic charge: are they equally reactive?
One of the species generated in water or aqueous solutions by the ionizing radiations are free electrons that quickly become "hydrated" or "aqueous electrons" (see for example this ...
- 9
2
votes
2
answers
443
views
How to find the angle of emission of an X-ray during impact of accelerated cathode rays?
X rays are produced when accelerated cathode rays strike a metal target or a metal anode.
How can we find the angle at which the X-ray is emitted from the metal anode or the target when the cathode ...
- 31
-1
votes
1
answer
38
views
Atoms in Solar Cells
An electric field in solar cells is created through photons knocking electrons off of atoms. What happens to the positively charged atoms once the electrons have been knocked off? Furthermore, are the ...
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
-2
votes
1
answer
313
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If two atoms "fight over" one electron, who will win? [closed]
If two atoms of different elements are both missing exactly one electron in their valence shell so that they have a charge of +1
and we place an electron between them, exactly in the middle.
Which ...
- 639
3
votes
1
answer
84
views
Do electrons truly flow in circuit? [closed]
I know this sounds like a stupid question, but do electrons truly flow in a circuit? It doesn't seem logical for electrons to just break away from their atoms to go move through a circuit. If they did,...
- 59
1
vote
1
answer
456
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Is Lightning Basically a Cathode Ray?
I've heard the term cathode ray pretty much every year in school since they introduced chemistry, and I know that it's a stream(?) of electrons. I'm just having troubles relating it to the real world. ...
- 11
1
vote
0
answers
51
views
How does SOFC work?
The Solid Oxide Fuel Cell is a particular case in which an oxide is used as a conductor. Once i've heard that oxides usually aren't good conductors but it turned out that a lot of oxides are ...
- 197
5
votes
1
answer
3k
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In a galvanic cell where the two electrodes are in the same electrolyte solution, why do reduction and oxidation occur separately?
In a certain book, I was presented with the following solution:
An iron nail is attached by a piece of wire to a magnesium ribbon, and the iron and magnesium are placed into the same container, with ...
- 51
2
votes
2
answers
2k
views
Electrolysis of Water: Overvoltage?
I've heard from a few sources that over-voltage in a electrolysis cell for water will cause a greater heat buildup with no yield. Is this true, and if it is, why is it true? From my electronics ...
- 527
1
vote
1
answer
117
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Placement of Electrodes for Electrochemistry?
I'm kind of curious as to the relationship between resistance and the yield of electrochemical methods. If I have my electrodes rather close together in a conductive solution the resistance will be ...
- 527