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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Why don't we equate ΔH or some other thermodynamic quantity with -nFE and instead use ΔG?

I was studying electrochemistry, and the very first equation that I came across was this, with no proof. $$\Delta G = -nFE$$The only explanation that was given was that the change in Gibb's free ...
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11 views

Is Ag/AgCl ink a colloid of Ag particles in aqueous AgCl solution?

Will it work as an electrode even if the the ink dries and the AgCl crystallizes?
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10 views

Choose electrolyte for electroplating

I am planning to try electroplating a steel ring with copper, than nickel, and than finally gold. It seems to me that this would be as simple as using a bath of HCl for electrolytes and attaching the ...
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23 views

Understanding Electrolysis

I have just started studying Electrolysis (high school level). So In the textbook, They are comparing E* value to compare the Products at anode and cathode. For eg, E* (Standard oxidation ...
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6 views

Does the rate of ion movment in a salt bridge affect the total voltage produced by a voltaic (Galvanic) Cell?

I was thinking that different salts used in a salt bridge in a voltaic cell may have different rates of flow (perhaps ionic radius or some other property effects the rate?) I was wondering, if some ...
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26 views

Electrolysis and reduction potentials [closed]

Why does the hydrogen gets reduced at the cathode and not $\ce{Na}$ when aqueous solution of brine is subjected to electrolysis? My book says because discharge potential of hydrogen is lower than ...
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15 views

Equilibrium potential example

Hi guys, just wondering if there is a mistake my lecturer made with this example she gave in one of her lectures, according to the Nernst equation, the oxidised species should be at the top and the ...
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1answer
38 views

Efficient oxidation of KCl to KClO3

I am trying to convert $\ce{KCl}$ to $\ce{KClO3}$ through an efficient process. I realize that I could electrolyze a solution of $\ce{KCl}$ to obtain some $\ce{KClO3}$ as a precipitate, however this ...
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16 views

When measuring the concentration of a solution using wheatstone bridge, why is AC used instead of DC? [closed]

I can't quite wrap my head around this after reading it in my high school textbook. How exactly does DC change the concentration of the solution (or what does it change really?) and how does AC come ...
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40 views

Software for Chemistry + Electrochemistry Workflow

I am working on a project (can't talk about it), but essentially we have a list of compounds which includes catalysts for electrochemical reactions (those that release energy), metals like Ti, Mn, Zn, ...
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14 views

Is a real voltaic cell ALWAYS schematically equivalent to an ideal battery and a resistor? [migrated]

In the diagram I have attached, the top circuit is the schematic equivalent I am trying to use to model the middle circuit which uses real voltaic cells (that have internal resistance). I am not sure ...
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20 views

Efficiency of Electrochlorination

When using electricity to create sodium hypochlorite from a solution of water and dissolved Sodium Chloride. I see in most instances that a fairly concentrated solution of brine (10% or more) yields ...
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30 views

NaCl Electrolysis - Dilute vs Concentrated - Nernst Equilibrium

Interested to know if there is a critical concentration at which $\textrm{Cl}^{-}$ will oxidise over H$_2$O and if this can be determined using the Nernst equation. That is, obviously if ...
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10 views

Does the ionic radius of an ion affect its rate of flow in an electrolye?

Do Ions of different Ionic Radius' have different speeds or rates of flow in an electrolyte and thus produce differences in currents? If so, would ions with smaller Ionic radius' move faster or ...
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1answer
48 views

Cheap metal to replace platinum in hydrogen fuel cell

Platinum is used as a catalyst in hydrogen fuel cells because it increases the efficiency. However, if I just want to make a fuel cell for demonstration purposes, I don't want to use a lot of money to ...
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1answer
35 views

How would using Different Salts in a Salt Bridge Effect the Voltage Generated by Voltaic Cell?

If I use a range of different nitrate solutions (e.g. calcium nitrate, iron nitrate) for the salt bridge in a voltaic cell, what effect would it have on the flow of ions in the Voltaic cells? Will ...
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1answer
36 views

Why water is not used in Electrochemistry [closed]

In electro-chemistry, we always use Metal and Metal ion electrolyte. My question is 1. why Water is not used as electrolyte. (because books only refer to Metal/Metal ion type electrods, they dont use ...
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9 views

Anodic chromic oxidation…cathodes material?

Speaking about the anodic chromic oxidation of aluminum and aluminum alloys, can anyone tell me what kind of material is better between stainless steel and ultrapure iron, for cathodes construction? ...
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5 views

Which is a better way to calculate E-cell [duplicate]

Suppose we have these two half cell reactions. In order to calculate E(Cu_+1/Cu), what is a viable way to do it. I looked up resources on when to simply reverse one equation and add/subtract the ...
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21 views

Why does copper and zinc connected by a wire in 6.0M NaOH become a galvanic cell?

For an experiment I placed two electrodes of copper and zinc connected by a wire in 6.0M NaOH. According to standard reduction potentials, there should be no reaction; however, the copper becomes ...
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17 views

Will the mass of a solution of copper sulfate and silver nitrate remain constant when electrolyzed?

Aqueous copper sulphate and aqueous silver nitrate are electrolyzed by 1 ampere current for 10 min in separate electrolytic cells. Will the mass of the copper and silver deposited on the cathode be ...
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21 views

Electrolysis with copper foil: There are plenty of spot

Currently experiencing electrolysis with copper foil instead of copper wire. I bought the copper foil from the ebay stating that this is 99.95% purity copper foil. This is just asking for some comment ...
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24 views

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 ...
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1answer
18 views

Electrode Potential at Equilibrium

Above is an excerpt from my book. It says that at equilibrium the potential difference develops between electrode and eletrolyte and it is electrode potential. But at equlibrium, should not the ...
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16 views

Electrochemistry, galvanization

In my textbook there is a question says: How to express the reaction of the process of galvanization of iron with zinc? The choices: $$\ce{Zn -> Zn^2+ + 2e-}$$ or $$\ce{Fe^2+ + 2e- -> Fe}$$ I ...
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27 views

Charge, Size, and Movement in Aqeuous Ions as Electrolytes

Would a pair of aqueous $+2$ and $-2$ ions necessarily conduct electricity better than the same concentration of $+1$ and $-1$ ions? Furthermore, would more massive ions not conduct as well as less ...
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1answer
48 views

Volcano plots: How is the data fitted?

When studying about catalysts I normally come accross volcano plots like the one shown below: What confuses me is how are the two lines fitted, how do you determine what points to include and what ...
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1answer
25 views

Conductometric titration of Strong Acid And Strong base

Consider conductometric titration of Strong Acid with strong base say HCl + NaOH. My question is why initially the conductance decreases. If H+ of HCl is consumed by OH- of NaOH, forming water and ...
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1answer
84 views

What will be the reaction between tin (II) chloride and copper (II) chloride?

I just tried conducting an experiment during lunch today. Now, I calculated this reaction 4 days ago dealing with electrochemistry, $$\ce{SnCl2 + CuCl2 -> Cu(s) + SnCl4}$$ Theoretically, I got ...
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22 views

The potential range of the cyclic voltammetry of CoCat in KPi made of D2O

I have a phosphate buffer adjusted to pH 7, and another phosphate buffer made of deuterium oxide (D2O) adjusted to pH 6.6 (pD 7). I want to conduct cyclic voltammetry of cobalt oxide catalyst in these ...
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2answers
48 views

Acrylic container and electrolysis

Normally when you do electrolysis, you would use a glass container. Would it be wise to use a acrylic container? I have one spare but not sure if this would affect the electrolysis process. Is there ...
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44 views

Calculating the electrode potential from thermochemical data

How can I calculate the electrode potential from thermochemical data? My attempt: I know that the electrode potential is dependent on the enthalpies of: atomisation, first ionisation, second ...
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18 views

Does deep cryogenic treatment on metal has effect on electrolysis?

Referring to this websites, http://www.frozensolid.co.uk/audio/ , what implication does it has on metal that has gone through the process? It sure seem to me, that it toughen the metal at molecular ...
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1answer
46 views

Increasing the length of a copper wire via electrolysis

I'm currently experimenting with copper coating using electrolysis. I'm using copper wire from my home, like the one you use for grounding. I want to electrolysis with longer copper wire (say 5 times ...
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16 views

N-factor of Hydrogen in Electrolysis of Water

At cathode, the reaction is: $$\ce{2H+ +2e- -> H2}$$ Equal equivalents of $\ce{H+}$ and $\ce{OH-}$ will be discharged at anode and cathode, respectively. Equivalents = $\frac{i\cdot t}{96500}$ ...
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1answer
20 views

Adding Standard Reduction Potentials

I am working the following USNCO problem (#41 from 2002). Based on this question and answer How to calculate reduction potentials from given standard potentials for cobalt?, it seems that $\Delta G$ ...
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25 views

Cell Potential Problem with Unusual Electrode

The problem reads: Calculate the cell potential, $E$, for a silver-silver chloride electrode immersed in $0.800~\mathrm{M}$ $\ce{KCl}$ at $298~\mathrm{K}$. Given: $$\begin{align} ...
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12 views

Chemisorption vs Physisorption?

What is the fundamental difference between chemical adsorption and physical adsorption. Why do some compounds chemisorb and others physisorb?
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17 views

Laws of electrolysis and quantisation of charge relation

The quantisation of charge was first suggested by the experimental laws of electrolysis discovered by Faraday I think about it a lot but could not find any relation, as the number of electrons ...
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20 views

Effect of passing H2S gas on Electrode Potential

Consider the cell reaction $$\ce{2Ag+ + Pb <=> 2Ag + Pb^2+}$$ If $\ce{H2S}$ gas is passed through the solution, what will be the effect on the EMF of the cell? My attempt: The ...
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30 views

Are Daniell cells rechargeable (reversible)?

I know that the Daniell cell is a primary cell and the reaction occurs as: $$\ce{Zn -> Zn^{2+} + 2e^-}$$ $$\ce{Cu^{2+} + 2e^- -> Cu}$$ However, I do not know if we can reverse the reaction by ...
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16 views

Halving the electrolyte concentrations of a voltaic cell

Say you have a standard voltaic cell with $Q=1$. The concentrations of both the electrolytes are at 1.0 M. If you halve the concentrations in both to 0.5 M, $Q$ still equals 1 and ...
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28 views

What is the relation between the standard electrode potentials for different oxidation states of an element? [closed]

Obviously, stripping more electrons off an element takes more voltage but is there a more exact relationship between the standard electrode potentials? Can one calculate the standard electrode ...
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17 views

structure of an electrochemical cell

in an electric circuit voltmeter is installed parallel , since it has a very big resistance and in the ideal form it s resistance is + infinite, but in chemistry, in electric cells, we install ...
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1answer
57 views

Tin in silver nitrate, any soln color change?

I have lab question in which a AgNO3 solution with a tin strip placed in it is mentioned. This isn't a reaction we actually did in the lab, but due to a color change in the solution of one we did do, ...
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24 views

Mathematical modeling of batteries (lithium ion)

My task is to learn how to model processes in the lithium ion batteries. What I found so far are just papers of concrete batteries but what I really need is the fundamentals behind it. Could someone ...
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24 views

Electrode Potentials, Redox Reactions

Construct a balanced equation for the reaction between $\ce{Cr^2+}$ ions and $\ce{Cr2O7^{2-}}$ ions in acid solution and calculate the standard potential. In my answer I wrote this equation : ...
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40 views

Electolysis of H2O to produce O2(g), in a small, portable unit

Full disclosure, I'm just a high school chem student, but I've got this question and I couldn't find the answer anywhere online. I was reading an article about some futuristic "artificial gill", which ...
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11 views

How long does it take to turn aluminum smelters on and off?

This may fit better under "engineering," but I figured I'd start here. Aluminum is produced through an electrolysis process, and Wikipedia tells me that the electrolytic cells need constant power in ...
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18 views

Why are copper objects tin-coated and does the copper corrosion get more rapid if the tin gets scratched away?

Copper is more electronegative than tin, it releases electrons less easily than tin. Am I right to think that this means tin is more likely to start corroding, and if the object (let's say a pan) gets ...