All Questions
7
questions
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How does cell potential change with temperature for positive enthalpy and negative entropy?
A recent United States National Chemistry Olympiad question asked:
A certain voltaic cell has a standard cell potential that increases with increasing temperature. Which best explains this ...
- 206
2
votes
2
answers
2k
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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
0
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1
answer
877
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Nernst equation and equilibrium
I am currently stuyding electrochemistry, and recently I've stumbled upon a problem where one is supposed to calculate the concentration of Fe3+ ions after a solution containing Fe2+ was titrated ...
1
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0
answers
49
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Calculating Equilibrium Constant from Cell Potential at Nonstandard Temperature
I'm currently working on a problem for a general chemistry class.
This is the voltaic cell given in the problem:
$$\ce{Sn^4+(aq) + Cu(s) -> Sn^2+(aq) + Cu^2+(aq)}$$
$$E^\circ_{cell} = \pu{-0.21 V}$$...
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1
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2
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2k
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Single electrode potential measurement
My textbook says that in a galvanic cell, it's not possible to measure single electrode potential independently. Instead, a Standard Hydrogen Electrode is used as the system is under equilibrium. Can ...
- 59
2
votes
1
answer
517
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Calculating Ratio of Stability Constants
Solution I contains a mixture of $\ce{FeCl2}$ and $\ce{FeCl3}$, and solution II contains a mixture of $\ce{K4Fe(CN)6}$ and $\ce{K3Fe(CN)6}$. The concentrations of iron-containing species satisfy the ...
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3
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0
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779
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Electrolysis of dilute and concentrated sodium chloride and the Nernst equation
Interested to know if there is a critical concentration at which $\ce{Cl-}$ will oxidise over $\ce{H2O}$ and if this can be determined using the Nernst equation.
That is, obviously if $[\ce{Cl-}]>...
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