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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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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33 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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13 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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46 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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14 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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16 views

Why do we use gold circuits instead of fiberoptics? [on hold]

Isn't gold more expensive? Doesn't fiber optic cable have lower latency?
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39 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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35 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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17 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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8 views

Galvanic cell.(the ZnSO4 container to be a zinc made container) [closed]

[1]: http://i.stack.imgur.com/jHWyv.jpg IF the A jar is made of Zn. I meant the container of ZnSO4 to be a Zn made container . THEN would the reaction occure?
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34 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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9 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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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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11 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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12 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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Silver Chloride Electrode

How exactly does the silver-chloride electrode work, and what goes on in a "silver-silver chloride cell"? The Wikipedia page has these equations: $\ce{Ag^+_{(aq)} + e^- -> Ag_{(s)}}$ ...
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19 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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20 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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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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16 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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42 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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22 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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21 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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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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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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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 ...
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47 views

Oxidizing and Reducing agent?

Which is the best oxidizing agent and the best reducing agent from the species listed below? $\ce{Na,~Zn^2+,~Ba,~Ba^2+,~Ag}$ I determined that oxidizing agent as $\ce{Zn^2+}$ because it appears on ...
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18 views

Junction Potential at Each End of a Salt Bridge

I am having trouble with the concept of a junction potential as it relates to the salt bridge of an electrochemical cell. I understand that a junction potential occurs between two solutions of ...
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59 views

What does electrolysis of Cu(NO3)2 produce?

I have read that $\ce{Cu}$ is deposited at the cathode when copper (II) nitrate is electrolyzed. However, when I looked at reduction potentials, the reduction of nitrate to $\ce{NO}$ and $\ce{H2O}$ ...
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37 views

Adding reduction potentials?

Will it be wrong to add reduction potentials of two intermediate reactions to get reduction potential of net reaction(just like as we do in adding enthalpies and applying Hess's law)? What is the ...
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Hot-side and Cold-side rechargeable chemical compound

I am wondering if such a chemical/material exists which, upon triggering, becomes cold on one side and hot on the other in which after all the chemical bonds are broken/built (however it would work), ...
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Polarity-specific membrane in a gas

Would it theoretically be possible to have a membrane within a gas only permeable by polar molecules? For instance, a membrane impermeable to oxygen as opposed to water vapour.
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Does standard electrode potential of a reaction depend on stoichiometric coefficients?

Take a reaction like this Fe+3 + 3e -> Fe now will the standard electrode potential change if we take 2 moles of Fe+3 and 6 moles of electron? 2Fe+3 + 6e -> 2Fe
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22 views

How do large ions behave when they are prevented access to an electrode in a solution with an electric field?

If I hooked two electrodes up to a battery and put them in a NaCl solution, the Na+ ions would flow to the anode and the Cl- would flow to the cathode. If I then added a large negative molecule, such ...
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50 views

Iron (II) Nitrate, Fe(NO3)3

I want to conduct an experiment that involves solutions of Iron (II) Nitrate and Silver Nitrate. However, I can't seem to find any Iron II Nitrate online therefore I started pondering upon whether or ...
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Best electrolyte solution for an experiment

We are trying to conduct an experiment where we pass low voltage, high current electricity through various metal powders with the aim of fusing the powder (via heat resistance). The hope is to ...
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52 views

Is a strontium-fluorine battery the highest voltage battery using pure elements?

Strontium has a very low standard electrode potential and fluorine has a very high one. $$ E_{\ce{F2 + 2e^- -> 2F^-}} = 2.87\mathrm{V} $$ $$ E_{\ce{Sr -> Sr^+ + e^-}} = -4.10\mathrm{V} $$ In ...
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Where did I go wrong in the following calculation for molar conductivity?

Resistance of a conductivity cell filled with $0.1~\rm{mol\, L^{–1}}\ce{KCl}$ solution is $100~\Omega\;.$ If the resistance of the same cell when filled with $0.02~\rm{mol\, L^{–1}}\ce{KCl}$ ...
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Why does AgNO3(aq) + Fe(NO3)2(aq) -> Ag(s) + Fe(NO3)3(aq)?

Reaction: $$\ce{AgNO3(aq) + Fe(NO3)2(aq) -> Ag(s) + Fe(NO3)3(aq)}$$ I want to extract some silver out of silver nitrate at school. My class has just finished Electrochem and using the knowledge I ...
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37 views

Wattage to produce 6L of air from Water in less than a second?

So I understand the question is probably vague to a scientist, but this is all the specifics I could mustard up with my non-scientific background. So I understand the basics of the process and have ...
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24 views

Can you measure the rate of a reaction if the products obtained are solid?

For a lab report, I want to measure the rate of electrolysis of copper sulfate with copper electrodes. The way I want to go about it is see how an increase in current will cause an increase in the ...
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28 views

Hydrogen Peroxide - Iron Nail Galvanic Cell?

I am planning to create a simple galvanic cell made up of common household materials. Suppose I have hydrogen peroxide (to serve as cathode), diluted in water, in one beaker, and I have a bunch of ...
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12 views

Seperate chlorine from sodium hydroxide

I made some sodium hydroxide with the chloralkali process, divided cell electrolysis. I hear there will be chlorine contaminants in the product, but I don't know how to purify it. Any ideas?
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Why did my lemon and penny battery fail?

I followed instructions in Popular Mechanics publication for making a battery using lemons and pennies but it didn't work. I have a few ideas on why it might not have worked and would like to know ...
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Glass electrode pH measurement

How is the potential difference between the outer and inner surface of the glass bubble in a glass electrode measured if an Ag/AgCl wire is used as the indicator electrode and Ag/AgCl/KCl is used as ...
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41 views

Gibbs Free Enegy using electrode potential under standard conditions

I have a question regarding the number of moles when using the equation $$\Delta G=-nF\Delta E$$ I understand that n is the number of moles transferred in the overall redox reaction, however, it ...
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25 views

Is it possible to have an airborn fluorescent particle that reacts to lightning?

I want to measure the expansion of the atmosphere when it is heated and impacted by lightning, to have an idea of the propagation of sound waves made by lightning. To do this, the ideal would be to ...
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21 views

Molar conductivity of aluminum sulfate

I am trying to find the molar conductivity of aluminum sulfate however I am stuck on how to find it. I have found the limiting molar conductivity of aluminum sulfate at 20.6 ˚C but am getting stuck on ...