All Questions
Tagged with electrochemistry water
49
questions
1
vote
1
answer
65
views
Is there Any Advantage to Using Multiple Steel Plates in an Electrolyzer?
If I have an electrolyzer (For water) is there any advantage to having additional steel plates in between the electrodes in solution? For some reason this appears to be a popular design and I'm not ...
- 527
2
votes
2
answers
1k
views
How does one determine the probability of H⁺ to H₂O in pure water?
The ratio of $\ce{H+}$ to $\ce{H2O}$ is something around $10^{-8}$. How did people determine that?
You cannot use the $K_\mathrm{w}$, $\mathrm{p}\ce{H}$, $\ce{[H+]}$ ion concentration value to answer ...
user24673
2
votes
2
answers
567
views
Is it possible to have electric field in water without having electrolysis?
Is it possible to have electric field in water (using electrodes with voltage difference) without having electrolysis in the water (or any other reaction)?
- 131
1
vote
1
answer
11k
views
How much hydrogen or oxygen will be produced in the electrolysis of water?
Is there a way to exactly calculate the quantity of hydrogen or oxygen in a water electrolysis? I am thinking of a plain and simple electrolysis like an anode and cathode in salted water separating ...
- 113
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
2
votes
2
answers
791
views
Hydrogen Fuel Cell and Battery
For hydrogen fuel cell to produce electricity, hydrogen will need to be supplied to the anode. To split oxygen and hydrogen from water and obtain hydrogen, we need to use electrolysis. To use ...
- 21
3
votes
1
answer
157
views
Formation of O₂, Water, and Electricity from Hydroxide?
The Clark Type Oxygen Electrode converts water, oxygen, and electrons into hydroxide via a hydrogen peroxide intermediate:
\[\ce{O2 + 4e^{−} + 2 H_2O -> 4 OH^{−}}\]
Which is the sum of:
\[
\begin{...
- 2,674
1
vote
1
answer
1k
views
Why is water considered ionic in fuel cells but otherwise covalent?
If water, $\ce{H2O}$ is a covalent compound formed by sharing of electrons, why is it said (in case of fuel cells) that formation of water from hydrogen and oxygen is a redox reaction (transfer of ...
- 11
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
1
vote
2
answers
141
views
Water purification procedure that does not involve a flocculant of any kind?
I have read about "electroflocculation" that uses less flocculant/alum, but is there a method – no matter how expensive or impractical – that uses no flocculant at all?
- 201
12
votes
3
answers
31k
views
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
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
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
13
votes
1
answer
13k
views
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