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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97 views

Rusting of iron is quicker in saline water than in ordinary water [duplicate]

I feel so because, saline water has more more electrons and because of that there will be oxidation will take place faster and hence the overall process will speed up. Is this explanation good enough ...
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130 views

Working principle of simple chemical cells

I have just learnt about simple chemical cells but I have no idea how to determine which cells will work and which will not and the working principle of those cells. I know that a chemical cell with $...
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2answers
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Would a hydrogen/oxygen fuel cell be a good choice for energy storage and generation in H2 rich atmospheric environments?

So imagine an atmospheric probe sent to enter the atmosphere of a giant gas planet. There would be no need to store hydrogen since a compressor or an inlet with sufficient dynamic pressure would allow ...
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68 views

Determining the theoretical mass of gas produced through the process of electrolysis

I have a question that has been stumping me for quite some time. I wish to calculate the mass of gas that is produced from varying concentrations of salt (NaCl) through the process of electrolysis. I ...
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1answer
46 views

Can a galvanic electrochemical cell produce current only one time without a salt bridge?

I think that galvanic cell produce current only one time without salt bridge. Potentional difference of both the electrodes are different and the electrons flow till their difference becomes same.Salt ...
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326 views

Protonation of nitric acid [closed]

I found that reaction: HNO3 + 4.1633363423443E-17 H3O = NO2{+} + OH{-} Please help me understand " 4.1633363423443E-17" term.
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473 views

Can we create a galvanic cell with only half a cell connected to the ground? [closed]

I have a question about electrical potential in galvanic cells ,suppose that we have only half a cell wich means that we have only one Ox/Red couple (one metal and the other as ionic solution ...)...
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1answer
34 views

How does a body lose electrons? [closed]

If there is a Na and cl in solid form , There will be atoms inside of them.How do they lose electrons ?.We know solid body has a structure and covering.Just like you can touch is the covering of table ...
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2answers
61 views

Confusion regarding the positively charged copper electrode in a Daniell cell [closed]

Suppose I bought a newly manufactured Daniell cell then in this situation, can someone explain what all will be going on at the zinc and copper electrode? (Since it is newly manufactured and not used ...
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1answer
44 views

Balancing simple Redox equation [closed]

How would you balance these two redox equations? Would you add a '2' in front of Pt2+ and a '2' in front of H+ ?
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82 views

Cell potential for redox titration of iron(II) with cerium(IV) [closed]

Calculate $E_\mathrm{cell}$ for an electrochemical cell consisting of SCE and a platinum wire indicator electrode dipped in a titration vessel containing $\pu{25 ml}$ $(\pu{0.01 M})$ solution of $\ce{...
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90 views

Is it easier to oxidise iron(II) to iron(III) in acidic or alkaline solution? [closed]

Is it easier to oxidise $\ce{Fe^2+}$ to $\ce{Fe^3+}$ in acidic or alkaline solution? $$ \begin{align} \ce{Fe &-> Fe^2+(aq) -> Fe^3+(aq)}\\ \ce{Fe &-> Fe(OH)2 -> Fe(OH)3} \end{align}...
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Why is it necessary to bubble hydrogen through the electrolyte in a hydrogen electrode? [closed]

I searched from the internet but i got confused. I was not sure about my answer.
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1answer
52 views

galvanic cell vs electrolysis [closed]

At school(high school), to calculate the voltage needed for electrolysis, we calculate the voltage produce if the elements were in a galvanic cell, preceded by a minus. So if a galvanic cell with Cu ...
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2answers
892 views

water in redox reactions [closed]

why water can't react as anode , with metals , in a redox reaction? while studying electrochemistry, i passed through a table with certain metals , all having voltage (potential energy) less than ...
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1answer
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Creating Photovoltaic Solar Cells [closed]

I have a friend who recently bought gallium off of Amazon (just for kicks, I have no idea why). I remember seeing that they use a form of gallium to treat photovoltaic solar cells. That got me ...
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65 views

Water side-reactions in organic electrochemistry (redux) [closed]

(note: this is a reposting of part of my original post which I was told had too many questions in one post) Please bear with me as I am a chemistry newbie, but I am autistic and have recently ...
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1answer
178 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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How do I determine which is the reduction reaction in a hydrogen peroxide and potassium permanganate solution?

How was it determined that $\ce{MnO4-}$ was reduction, and $\ce{H2O2}$ was oxidation? Also, why wasn’t the equation $$\ce{MnO4- + 2H2O + 3e- -> MnO2 +4OH-}$$ used? Or the $$\ce{H2O2 + 2H+ +2e- -&...
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1answer
560 views

How to remove hydrate from Fe(NO3)3 . 9H2O?

I am currently in a dilemma where I need to have pure Iron (III) nitrate, but I have Iron (III) nitrate 9 hydrate in order to do a lab experiment where I investigate voltaic cell. I am pretty sure the ...
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1answer
92 views

Why does it so long for a Lithium-ion battery to be charged from 98% to 100%? [closed]

Why does it so long for an Lithium-ion battery to be charged from 98% to 100%? It is not even comparable to the effort I exerce to pump my bike tires from 95 psi to (the minimally usable) 100 psi. ...
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93 views

Which corrodes faster at 5% NaCl solution at room temperature: Steel or Aluminum? [closed]

Which corrodes faster at 5% NaCl solution at room temperature: Steel or Aluminum? Is it true that Al has high corrosion resistance? Or is it just a myth as stated in this article.
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How to calculate the equivalent weight or N-Factor of compound(acid, salt, base or etc) using electrolysis concept

Our sir, told us about the concept of equivalent weight using electrolysis and Faraday's Law of electrolysis. We got to know ...
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48 views

Which is a better electrolyte for electroplating copper? [closed]

I need to know which is a better electrolyte to use when electroplating copper: copper sulfate or copper nitrate?
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185 views

Can I combine two galvanic cells as one and produce infinite current

I thought if I combined 2 galvanic cells so that the middle one serves as the anode for one cell while being a cathode for the other due to difference in standard reduction potential and the middle ...
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1answer
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Why is AC current used rather than DC current for calculating the conductance of a solution(see body)? [closed]

I was reading the answer of the above question from a book. it said that while using DC current, electrolysis occurs. Hence it affects the conductance of the solution. But if any gaseous product is ...
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How exactly lithium metal is produced? [closed]

Wikipedia and other sites say that lithium metal is produced by making the electrolysis of a mixture of half lithium chloride and half potassium chloride "at about 450°C"... What is the chemical ...

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