Questions tagged [conductivity]

A material's ability to conduct electric current or thermal energy by any means.

31 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
7
votes
0answers
1k views

Mathematical Expression for Limiting Molar Conductivity

I have been fiddling around with the theory of electrolytes, specifically molar conductivity, and ways of calculating limiting molar conductivity $\Lambda^0$. I was able to come up with the ...
6
votes
0answers
188 views

Conductivity measurements of demineralized water - Unexpected results. Looking for explanation

I'm trying to measure the conductivity change of demineralized water over a few days. But I get results I can't explain. Setup This is the circuit and cell I'm using: Where $R_x$ is the ...
4
votes
0answers
25 views

Further reading on photoconductivity of hemoglobin

I recently ran into this paper which describe experiments that confirm that hemoglobin is photoconductive. Finding this fact as incredible, I wanted to read up more on photoconductive properties of ...
4
votes
0answers
296 views

Conductivity of electrolyte solution

I found a relationship online between the conductivity of electrolyte and current. $$i = F \sum_i z_i N_i = F^2 \left( \sum_i z_i^2 u_i c_i \right)\nabla\phi = -\kappa\nabla\phi \qquad \kappa = F^2 \...
3
votes
0answers
69 views

What makes ionic conduction fast or slow?

Sometimes in certain electric circuits (such as in voltaic cells) ions are moved around as well as electrons. I have a basic understand of what materials (mostly metals) conduct electrons well but ...
2
votes
0answers
132 views

Conductive hydrophobic material

I was looking for a conductive hydrophobic material if there is one? If not why? I was researching and I found some material about laser etching on metals that causes superhydrophobicity but that I ...
2
votes
0answers
28 views

On what basis are certain elements selected for doping silicon?

I read online that transistors are made by doping silicon with other elements such as arsenic, phosphorus, or aluminium in order to increase its conductivity. How are these doping materials selected?
2
votes
0answers
70 views

If a conductivity meter is calibrated with aqueous standards, can it be used to measure the conductivity of an organic-based solvent system?

Trying to figure out if the calibration solutions for a conductivity probe/meter must be of a similar nature to the system which will be measured. I can only find aqueous calibration solutions online, ...
2
votes
0answers
685 views

Is superglue a good thermal insulator?

How good of a thermal insulator is superglue compared to other materials like ceramics, plastics, and metals? I know this might not seem like a chemistry question, but I was hoping someone here could ...
2
votes
1answer
6k views

Can solutions of polar covalent compounds conduct electricity?

I learned in class that solutions of polar covalent compounds are weakly conductive, while ionic solutions are strongly conductive. But I'm getting different answers online. According to this lecture,...
1
vote
0answers
21 views

Factors that influence the electrical conductivity of metals

The electrical conductivity of metals is a physical property of these materials. Much of the theory used to explain the electrical conductivity of metals is also based on physics understanding. ...
1
vote
0answers
17 views

Investigating the effect of solvents on the alkaline hydrolysis of ethyl acetate

In the following reaction, I believe a polar aprotic solvent like propanone will be more favorable since the partial negative charge on the oxygen atom in propanone will attract the sodium ion from ...
1
vote
0answers
60 views

Conductivity variation on Caustic (NaOH) Dilution System

I am reading the drawing for an automatic caustic dilution system where 50% NaOH is diluted down to 20%. I was expecting to see a density sensor on the outlet to provide feedback to the dilution ...
1
vote
0answers
31 views

Looking for a theory predicting conductivity values of electrolytes at higher concentrations

I'm looking for a theory to calculate the electrical conductivity of electrolytes, namely $\ce{NaCl}$ and tartaric acid ($\ce{C4H6O6}$) dissolved in water, depending on their concentration. The only ...
1
vote
0answers
114 views

Why does conductivity of electrolyte solutions peak at high concentrations?

I've recently done a lab about conductivity of brine over time (high concentration salt water). I passed current through salt water and measured the current over time. The graphs I got showed that ...
1
vote
0answers
385 views

Measurement of cell constant

Why is cell constant value measured through indirect methods (like using a solution whose conductivity is already known)? Isn't it easier to measure the length and area of cross section of a ...
1
vote
0answers
89 views

NiO and ZnO electrical conductivity with oxygen pressure

NiO is a Mott-Hubbard insulator and increasing oxygen concentration leads to anion excess and oxidation of Nickel so electron hopping is more favourable so electron repulsion is reduced and it becomes ...
1
vote
0answers
32 views

ZnO layer as a passivity layer

I have bought a zinc sheet and with SEM I can see a ZnO layer, which is a passivity layer. But when I connect this sheet to a conductive wire, le zn sheet is conductive too. Is that normal ? the ZnO ...
1
vote
0answers
21 views

Which contributes more strongly to ionic conductivity, charge or mobility?

Conductivity depends on the magnitude of charge as well as mobility. Which will be the dominating factor in the case of opposite trends in these two properties?
1
vote
0answers
95 views

Conductive liquid, that after evaporation will allow me to use my gloves with a smartphone

I'm looking for a conductive liquid that, after it evaporates, leaves the material that has been exposed to it conductive. I'd like to use my smartphone with gloves. I do have a pair of professional,...
1
vote
0answers
46 views

How does SOFC work?

The Solid Oxide Fuel Cell is a particular case in which an oxide is used as a conductor. Once i've heard that oxides usually aren't good conductors but it turned out that a lot of oxides are ...
1
vote
0answers
944 views

Why does sodium chloride not conduct as much as aluminum chloride in water?

I understand how $\ce{NaCl}$ and $\ce{AlCl3}$ dissolves in water but I'm wondering why one is more conductive than the other. Is it their extra ions to conduct the electricity? I know that in $\ce{...
1
vote
0answers
38 views

Is there a material that turns from being electrically conductive to non-conductive irreversably upon exposure to some form of radiation?

For my project I am looking for a material which can turn from being electrically conductive to nonconductive (has to be irreversible) upon exposure to electromagnetic radiation (say UV). I tried ...
1
vote
0answers
230 views

Reduced Graphene Oxide (RGO) Conductivity vs Everything Else

Reduced Graphene Oxide (RGO), is the reduced version of Graphene Oxide (GO). Both RGO & GO are easily manufactured when compared to the complex process used to manufacture the 'atom-thick' ...
1
vote
0answers
114 views

What is the equation that demonstrates the relationship between molar conductivity and temperature?

Can someone please help me find the equation that defines the relation between molar conductivity and temperature. I have found some information, but it was not really that much complete.
1
vote
0answers
436 views

How to determine limiting conductivity of specific ions?

Given a table with equivalent conductivity of certain electrolytes, how can I determine the conductivity of separate ions? I know that you can find the difference between for example $\ce{K+}$ and $\...
1
vote
0answers
1k views

Sulfuric Acid Resistance / Conductivity

I diluted sulfuric acid in deionized water in order to get a 10% $\ce{H2SO4}$ solution. I was going to use this solution as a cathode of a porous sample to measure its electrical properties. However,...
0
votes
0answers
33 views

Fabrication and/or Selection of a Single Crystal Ionic Conductor

I want to fabricate or buy single crystal ionic conductors for usage as solid state electrolytes in batteries testing. However, I am having trouble finding anyone that can sell appropriate materials. ...
0
votes
0answers
132 views

Proof of Concentration dependence of molar conductivity

If we go by the simple electron model, Conductivity/Concentration=carrier charge*mobility and mobility is only dependent on temperature for electrons. My question is regarding strong electrolyte, I ...
0
votes
0answers
187 views

How does a metal atom's size affect the electrical conductivity of it's giant metallic structure?

In giant metallic structures, how does a metal atom's size affect the structure's electrical conductivity? (i.e. what happens if you go down a group of metal elements?)
0
votes
0answers
156 views

How to electronically calculate alcoholic level of a liquid

Is there any way to estimate the alcohol content of a drink with an electric test? Is alcohol in a liquid (e.g wine) dependent on the drink's conductivity?