Questions tagged [electrochemistry]
The branch of chemistry that deals with the study of redox reactions and how they can be applied to generate electricity (in electrochemical cells) and to carry out non-spontaneous reactions using electricity (electrolysis).
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Irreversible uncharged acid/base indicator
I am conducting a process in an electrochemical cell where at the cathode or anode surface the pH might be acidic or basic. To figure out if either one is correct I would like to find a reaction that ...
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Negative Open Circuit Potential with Large Magnitudes [closed]
I am currently trying to analyze the OER performance of a catalyst using a 3-electrode setup. Usually I do the following: I connect the electrodes to the potentiostat THEN I turn on the potentiostat. ...
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Will electrolysis hydrolyze esters?
I'm doing some electroplating. Now, I want to know which components of my electroplating solution are being expended as I go about electroplating. I needed a wetting agent/surfactant & decided to ...
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Degradation via electrolysis and electrode surface area
What is the relationship between electrode surface area and processes such as electrolysis/electrode polarization?
Let's say for example I want a fixed electric field between two electrodes in a ...
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Correct Interpretation of Apparent Charge Transfer Coefficients
Good day guys,
I was looking over some $i$ vs $\eta $ for a redox reaction over a copper cathode, the cell has $\ce{LiBf4}$ in THF as the electrolyte. The main reaction taking place is:
$$\ce{N2 + 6 ...
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Why zinc metal in solid state has an initial tendency to lose electrons when a zinc metal strip is dipped in a zinc sulphate aqueous solution?
Let us say I dip a metallic strip of zinc in a container filled with zinc sulphate aqueous solution. On observing the changes occurring in the solution, we would find that the zinc metal present in ...
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How to remove glass shards out of a tiny hole to fit capillary tube?
This is oddly specific, but I am having trouble making the setup work for my electrochemical cell. We're doing Scanning Electrochemical Cell Microscopy (SECCM)* and the device has a capillary tube fit ...
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Why does my data drift from the nernst equation at low values of Q?
I saw a similar question from last year but there were no answers and I was facing the same problem.
I designed an experiment for a nickel-nickel concentration cell where the cathode is kept at 1M and ...
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Cyclic Voltammetry for a Capacitor - Positive Current, Potential is decreasing?
In the boxed red region, why is the potential decreasing when the current is still positive? To my understanding, when the current is still positive (i.e. not changing direction), the capacitor will ...
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Short-circuiting an electrolytic cell with metal dendrites and observing interesting chaotic 1/f noise
While conducting home experiments on the electrolytic deposition of copper in a micro-gap (2-3 mm), under a microscope (x40) I observed interesting effects of short-circuiting by metal dendrites of ...
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Why is my Ni or Fe cathode blackening and pores getting blocked during alkaline (6 M KOH) electrolysis?
I am conducting an electrolysis process for hydrogen $(\ce{H2})$ and oxygen $(\ce{O2})$ generation using a $\pu{6 M}$ $\ce{KOH}$ alkaline solution.
During the process, I have observed that my cathode ...
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How voltage adds in batteries connected in series from an atomic perspective [duplicate]
I'm looking for an explanation at the atomic level for why voltage is added when batteries are connected in series. I've done a bit of research and read some recent answers but they don't really ...
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How do 2 beaker electrolytic cells work?
I've never seen a 2 cell eletrolytic cell before.
I am comfortable with how a 1 cell (standard) electrolytic cell works. But I have never seen this before:
Electrodes P and Q are made of metal M.
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Experiment on pH vs Rate of Electrolysis - what do the results actually say?
My experimental setup looks at using different pH solutions (of $\ce{H2SO4}$ and $\ce{NaOH}$) for electrolysis of water with a Hoffman setup and then measuring the rate of production of gas (note this ...
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How can reduction and oxidation occur separately in batteries if they're meant to be one reaction?
According to this page along with many others, oxidation and reduction must occur simultaneously. However, in a battery, it seems like they actually occur separately. Oxidation must first occur to ...
