Questions tagged [electrolysis]

For questions about the chemical concepts of electrolysis.

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Why is there water dripping form copper wires after brine electrolysis?

Just To be clear im a hobbyist and I was electrolysing an NaCl solution with an iron anode and graphite cathode to test if Fe(OH)3 would be produced or not(it did) and to secure the electrodes i just ...
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How does lightning dissipate in water?

I understand electrolysis, but I'm not sure whether the same happens when lightning strikes water. I imagine this discharge as electrons getting into water — that would be the cathode which could ...
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Salt bridged electrolysis of aqueous magnesium sulphate problem

I want to conduct a salt bridged electrolysis on MgSO4(aq), but I am worried that the sulphuric acid produced will react with my graphite electrode, but I'm not sure because I read a paper that the ...
Dis-guy's user avatar
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Are there problems with this electrolizer?

I was searching Youtube for designs to make an electrolizer. Finally I find this very promising design: https://www.youtube.com/watch?v=7e2gDjJqz5U. The problem I have with this design is it is too ...
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Feasibility of Linking a Voltaic Cell to an Electrochemical Cell

I recently conducted an electrochemistry experiment in which I connected a voltaic cell to an electrolytic cell. The voltaic cell contained copper (wire) and aluminium (foil) electrodes and when ...
Choze's user avatar
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Water electrolysis with in-series electrodes

I'm trying to improve my efficiency when doing water electrolysis. For my specific application, I don't need to separate the hydrogen and oxygen gasses, in fact it's important that I don't. But it's ...
user142480's user avatar
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How to calculate theoretical value of mass output using electrolysis with different electrolyte concentrations?

I am writing a research paper on a zinc-copper electrolysis experiment observing the mass output of Zinc on a copper cathode, in which I am changing the concentration of the zincsulfate electrolytic ...
user142120's user avatar
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Charge as a function of time in electrolysis

According to Faraday's laws of electrolysis, $\frac{Q}{Z}$ = no. of moles of substance released (n), where Z is n-factor x 96500. Assuming the electrolyte is a strong electrolyte, specific ...
chocolate kiwi's user avatar
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Effects on pressure on reverse electrolysis

I am interested in the effects on pressure of the following reaction. $$\ce{O2 + 4H+ + 4e- → 2H2O}$$ I have been trying to find data on this for a while, and I am sure that the information exists, but ...
Evelyn21's user avatar
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1 answer
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Electrolysing two salts with the same anion

Assume that I prepare solutions of sodium chloride (NaCl) and potassium chloride (KCl) in equal molarity, then combine them together to form a single homogeneous mixture. Then I electrolyse this ...
Youstay Igo's user avatar
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Electroless plating

One of the simple methods to plate metal layers onto non-conductive surfaces is to attach graphite onto the surface. And this is what we call electroless plating. Here, I take the electroless plating ...
Freeby Freeby's user avatar
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Can a multimeter be used to measure PH?

I would like to feed my garden a solution of water and Trisodium Phosphate (TSP), but I am uncertain of the correct amount of TSP to water ratio. Too acidic or too basic of a solution can harm my ...
user148298's user avatar
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Find cell configuration notation for permanganate in acidic medium

They gave us an unbalanced reaction of permanganate and iodide in acidic medium, and ask to balance the reaction using redox methods and the write the cell configuration notation for the resultant ...
creepshow's user avatar
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Electrolysis with sodium acetate solution - pH stratified layers - what happened?

I electrolyzed 0.5M CH₃COONa in an H-Cell with a pH-sensitive dye using platinum electrodes. From the attached pic, you can see that an acidic layer formed at the top of the anode solution, while an ...
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Why does water present in aqueous solution of CuSO4 ionize into H+ and OH- during its electrolysis?

It’s written in books that during electrolysis of aqueous solutions of $\ce{CuSO4}$ or $\ce{NiSO4}$, the water particles ionize into $\ce{H^+}$ and $\ce{OH^-}$ ions along with dissociation of the ...
Arbinda's user avatar
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Did my electrolysis experiment produce NaOH? [closed]

I recently conducted an electrolysis experiment on saltwater, hoping to obtain chlorine gas and sodium hydroxide. The experiment ran for approximately 12 hours, powered by a 9V battery. To my surprise,...
CarbonatNatria's user avatar
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Residual current in electrolysis

On this site: https://water.lsbu.ac.uk/water/electrolysis.html there is a graph showing current-voltage characteristic for electrolysis of water: I am wondering, if I apply voltage lower than ...
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Using sodium metasilicate as a non-reactive reusable electrolyte in water electrolysis

I'm trying to increase the transport of electricity in the tap water I use in my dry cell electrolyser. Table salt is out, as it rusts the stainless steel electrodes and produces toxic gasses. Lye is ...
Ron McDonald's user avatar
3 votes
1 answer
110 views

How to determine uncompensated or solution resistance of a 3 electrode setup for IR correction?

To correct for ohmic losses from the potential drop across the electrolyte due to the distance between the electrodes, electrochemical impedance spectroscopy (EIS) is typically employed to measure ...
Daniel Leo's user avatar
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Temperature and electrolysis

Based on my understanding, metals conduct electricity better at lower temperatures than at higher temperatures as the resistance to electron flow is lower. Then, what about ionic compounds? Do they ...
Chemistry student's user avatar
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1 answer
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Gallium & Electrolysis

Preface this with I'm a chemistry newb. Ive finished chem I and II and did extremely well, but I think that means I know just enough to get myself in trouble....Also, sorry if this is a little long. I'...
David's user avatar
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Electrolysis of gasoline (or other uniform liquid hydrocarbon) [closed]

Electrolysis, when I usually search about it, is almost exclusively interested in splitting $\ce{H2O}$. However, looking at the Wikipedia article on electrolysis, it seems like it works for a bunch of ...
G. Putnam's user avatar
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Is potassium Sulfate a good electrolyte for the production of oxy-hydrogen?

I am currently conducting an electrolysis experiment using a 30 amp power supply with a voltage ranging from 10 to 16 volts.I am thinking of using potassium sulfate (K2SO4) dissolved in water as an ...
Noah's user avatar
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Electrolysis of Copper (II) Sulfate Solution with graphite electrodes

In the electrolysis of Copper (II) Sulfate solution with inert graphite electrodes, the electrons from the power pack will first go to cathode. I understand what happens at the cathode - the copper ...
Jay Chen's user avatar
1 vote
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Proton Exchange Membrane H2 generator transports too much water to output

I am using a PEM cell to generate H2 (eventually D2). The PEM cell is fed water on the cathode (O2 side) only, but it transports about 3.5x as much water over to the cathode (H2 side) as it actually ...
Eric Slighton's user avatar
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2 answers
184 views

If Standard Reduction Potential and Standard Oxidation potential are equal in magnitude and opposite in sign?

If Standard Reduction Potential(SRP) and Standard Oxidation potential(SOP) are equal in magnitude and opposite in sign , Then as per this As we know SRP of H2O is -0.83 V as per this SOP of H2O should ...
Test Test's user avatar
3 votes
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32 views

What parameters do you use to find the order in which elements will leave a solution during electrolysis?

I am looking to perform electrolysis on a molten solution of many elements, specifically a mix of iron, sodium, potassium, silicon, aluminum, and titanium oxides and chlorides. What I'm trying to ...
Lark's user avatar
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Which reaction would take place if we sent electric current IN a voltaic cell, electrolysing it?

I know how the voltaic cell normally works, producing current. It is not what I'm asking about. I know that normally, the Zinc electrode slowly dissolves (it is anode, $\ce{Zn -2e^- -> Zn^{2+}}$), ...
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Does a porous medium have to be charged in order for the fluid to establish the streaming potential?

In Wikipedia, I read: Adjacent to the channel walls, the charge-neutrality of the liquid is violated due to the presence of the electrical double layer: a thin layer of counterions attracted by the ...
user134613's user avatar
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Explanation of colours of solder plated copper pads after electrolysing a circuit board in NaCl solution

A last ditch method for identifying connections in a old multilayer circuit board that I have come up with, when you have a spare, is to put the board in salt (NaCl) solution and connect a power ...
REPuzzle's user avatar
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Can copper hydroxide be formed as a byproduct of water electrolysis?

I was electrolysing water with a 12v DC power supply at about 3 milliamps, using copper wire for both my anode and cathode. The solution was about 17 grams of table salt in 750 milliliters of purified ...
Taxolotl's user avatar
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1 answer
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Passing protons through cation-permeable membranes

Protons are attached to a water molecule (making hydronium) in acidic solutions. If a container was split through the middle with a cation-permeable but anion impermeable membrane and, say, HCl was ...
Video Carp's user avatar
-1 votes
2 answers
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Electrolysis of Solutions

So far I've only encountered formulas to solve for solutions of single molecules while learning about electrolysis, i.e. H2O or FeCl3. This generally has involved determining the resultants, ...
Curious About Chemistry's user avatar
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2 answers
113 views

Do formed galvanic cells counteract electrolysis?

I was wondering about the following: Suppose we carry out an electrolysis with constant applied voltage. During the process, a galvanic cell should be formed by the reactants which are formed during ...
Mäßige's user avatar
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I have been able to make sulfuric acid from alum using a membrane cell. What else other than alum can I use to improve yields

Here is how I was able to make sulfuric acid. A membrane cell was made by placing a earthen clay pot in a larger vessel. 1.Make concentrated solution of potash alum. 2.Pour alum sol into both sides of ...
The Entity's user avatar
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2 answers
131 views

Electrode potential and likeliness to reduce/oxidize (electrolysis) [closed]

I'm a little confused about situations where multiple chemical compounds can be reduced/oxidized and the likelihood of this happening to one compound over the others, depending on the electrode ...
c.leblanc's user avatar
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When refining copper through electrolysis, do the copper ions from the electrolyte copper sulfate get reduced at the anode?

Copper sulfate is the electrolyte that is brought up most commonly when we talk about the refining of copper. Do any of the copper ions from the copper sulfate solution reduce at the anode like the ...
chem_student's user avatar
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279 views

Can deuterium be separated from heavy water via electrolysis? It is an isotope of hydrogen, so I guess it should act in the same way?

I was wondering if it is possible to separate deuterium from heavy water via electrolysis. Also, is this the way deuterium gas is obtained on an industrial scale, or are there better methods?
Arbor Chetia's user avatar
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Removing Copper from drinking water by Electrolysis? What to keep in mind?

The drinking water in my flat contains a lot of copper. Although the amount of copper is around the allowed limit 2mg/l I would prefer to reduce it. I know that it is at this value from a paid ...
datenheim's user avatar
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1 vote
1 answer
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Pourbaix Diagram and Galvanic Cell

I am trying to understand how a galvanic cell where copper and mild steel are linked occurs. It seems that on most galvanic series, Fe and Cu are far enough apart (>.2V difference) that Fe would ...
Porter Garst's user avatar
10 votes
3 answers
2k views

Is there any process that converts water into hydrogen and oxygen by using light and a catalyst?

Can water be converted into hydrogen and oxygen using sunlight and a specific catalyst? I can imagine a electrolysis reaction using a catalyst that uses light to release electrons. The goal is to find ...
jessegerritsen's user avatar
-2 votes
1 answer
57 views

Are electrodes in an electrolysis unique for every electrolyte or can any random electrode be used with an electrolyte during electrolysis

For example, during the electrolysis of water, platinum electrodes are used, why can't I use any other electrode as long as they are conductors? why does some electrolysis require specific electrodes ...
Martins's user avatar
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1 answer
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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 ...
Dee's user avatar
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1 vote
1 answer
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Is anodizing of mixed metals (aluminium and cooper) possible?

I'd like to blacken my Noctua NH-P1 passive cooler, made from an aluminium fins and copper heatpipes. Since thermal dissipation is key in my build, I thought about anodizing it, instead of spray paint ...
Raymond Osterbrink's user avatar
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1 answer
97 views

Electrolysis of water+salt: Which molecules is the product?

I should show the kids how electrolysis could create $\ce{H2}$. We used a drinking glass of water mixed with salt. Then we put an 1.5 volt AA battery in the glass and the electrolysis was visible ...
hschou's user avatar
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2 votes
2 answers
567 views

Kolbe's electrolysis reaction for alkenes' production

I came across a question in which the major product was asked for Kolbe's electrolysis of potassium salt of 2,3-dimethylbutane-1,4-dioic acid. The answer was given as trans-(but-2-ene). I couldn't ...
Aspirant's user avatar
0 votes
1 answer
349 views

How can I produce Red Iron oxide with electrolysis

I am producing Iron Oxide with the intention of using it for pigmentation. My attempts so far have been to use electrolysis. My first attempt I used Borax as an electrolyte and a 12 volt adapter with ...
Riley Hughes's user avatar
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What happens to undissolved salt during electrolysis of brine?

Say we have a container of brine with excess NaCl in the anode, and a seperate container with just water at the cathode. Both are connected by a salt bridge. If we perform electrolysis, Sodium ions ...
Lucian cahil's user avatar
-3 votes
1 answer
361 views

When performing electrolysis of brine, are carbon steel electrodes ok? [closed]

Are carbon steel electrodes better? Do they both eventually corrode? Is there any cheap electrode that stays inert indefinitely?
Lucian cahil's user avatar
-2 votes
1 answer
183 views

Why is copper discharged in the electrolysis of copper (II) sulphate solution instead of hydrogen?

In the electrolysis of copper (II) sulphate with graphite electrodes, I am confused why copper ions are discharged and form copper metal at the cathode. As far as I know hydrogen ions have a lower ...
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