All Questions
Tagged with electrochemistry water
49
questions
18
votes
3
answers
4k
views
Can an aqueous solution conduct electricity forever?
We know that pure water does not conduct electricity, but salt water is a decent conductor. This is commonly explained by saying that “the ions carry the current through the solution”, which is an ...
- 377
13
votes
1
answer
13k
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If electrolysis splits water, why does only either hydrogen or oxygen (but not both) bubble up on one pole?
If electrolysis splits water, then that means that $\ce{H2O}$ is split into $\ce{H}$ and $\ce{OH}$ or $\ce{O}$.
How come that if a water molecule is split at e.g. the negative pole (anode), only the ...
- 311
12
votes
3
answers
31k
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How does high-frequency electrolysis of water work?
I have read that combining the DC current with a high-frequency AC current, the electrolysis of water speeds up. Is this true? In that case, how is less energy wasted as heat? Or does it simply ...
- 1,381
12
votes
6
answers
592
views
Is there any electronic component to water conductivity?
Answers to Decrease in temperature of a aqueous salt solution decreases conductivity indicate that the electrical conductivity of salt solutions arises from the mobility of ionic species and therefore ...
- 5,900
9
votes
3
answers
2k
views
Is electrochemically activated water a real technology?
In essence what I'm asking is if the applications of Electrochemically activated water (ECA water) as a bactericidal-disinfectant is real and profitable (especially this last part). The principle at ...
- 93
9
votes
1
answer
12k
views
Identity of a green substance formed during electrolysis reaction?
I did a short experiment in which I connected a $1.5\:\mathrm{V}$ battery with 2 paper clips into a bowl of water to which I added salt. After a while, I saw a yellowish-greenish cloud inside the ...
- 93
8
votes
4
answers
1k
views
In electrolysis, why does each atom wait to turn into gas until they reach a particular electrode?
More specifically why don't bubbles of both oxygen and hydrogen appear everywhere?
If the electricity just breaks apart bonds wouldn’t the hydrogen and oxygen just immediately turn into gas and bubble ...
- 273
8
votes
4
answers
9k
views
Ratios of produced gases in water electrolysis
I just did a little water electrolysis experiment at home by immerging two aluminum electrodes in water with a small amount of table salt. The voltage of the battery was 6 V.
What surprised me is ...
- 181
6
votes
1
answer
32k
views
Salt concentration and electrical permittivity of water
We know that the electric flux density $D$ can be related to electric field intensity $E$ as
$$D = \epsilon(\omega) E$$
where
$$\epsilon(\omega) = \epsilon_0 \epsilon_r(\omega)$$
and $\epsilon_0$ ...
- 207
6
votes
2
answers
208
views
Protons and osmotic potential
In a hypothetical enclosed membrane only permeable to water (including hydronium), where inside the pH is lower than the outside, would water move inside?
- 61
5
votes
4
answers
1k
views
Explanation for a basic decomposition of water experiment
My son is trying to write a conclusion for a basic decomposition of water experiment using a 9 V battery (with a test tube placed over each terminal) placed inside a salt water solution. The results ...
- 75
5
votes
1
answer
2k
views
How can I produce hydrogen gas efficiently and cheaply?
I have been intrigued by one of the principles of chemistry lately- electrolysis. In my knowledge, electrolysis is a quite dangerous operation as the decomposition of water produces hydrogen and ...
- 163
4
votes
1
answer
892
views
Electrolysis of water: Which equations to use? (IB Chem)
There is a list of standard electrode potentials at 298 K from the p. 23 of IB Data Booklet 2016. Which of the following equations (forward/backward reactions), from the two possible ones involving ...
- 43
4
votes
1
answer
7k
views
What is the electrical conductivity of pool water?
What is the electrical conductivity of pool water? I tried to find some information, unfortunately without success. I need to know it to make an underwater electronic project.
- 63
4
votes
1
answer
3k
views
Does the temperature of water change during electrolysis?
Applying an electric potential to impure water splits water into its constituents H/O.
Does the temperature of the electrolyte change during this electrolysis?
- 904