Questions tagged [conductivity]
A material's ability to conduct electric current or thermal energy by any means.
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Photoconductivity of Selenium
Selenium is a good conductor of electricity in presence of light. This phenomenon is called photoconductivity. How does this phenomenon occur? Are there any other elements or compounds in which this ...
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Can someone explain why the electrical conductivity of magnesium chloride decreases with increasing concentration?
I was under the impression that the electrical conductivity should increase initially, then begin to plateau, then fall past the saturation point for strong electrolytes. However, from this, I see ...
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On the definition of Molar conductivity
The textbook I follow defines the conductivity, $\kappa$, as
$$\text{Conductance} \ G=\frac{1}{R}=\kappa \frac Al$$
The inverse of resistivity, called conductivity, is represented by the symbol $\...
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Why doesn't pure water conduct when it dissociates? [closed]
Sorry if this is an obvious question.
I am told water dissociates, one product of which is negatively charged hydroxyl ions. This makes sense, but then why doesn't pure water conduct electricity? ...
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Soil conductivity: How do I get a near equivalent between meq/100 g to mS/cm?
I have two soil reports, one that reports CEC as 45 meq/100 g and another that reports 6 mS/cm using 1:1 water soil.
I can see that the two are, if not apples and oranges, they are at best tangerines ...
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Conductivity of water and chlorine?
I am a novice in chemistry and i have a question: I know that water is not a good conductive material (since there is a perfect bond in water I think) but I am thinking that if we add chlorine which ...
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Conductance and Conductivity of acid base titration?
I have a question with $\ce{NaOH}$ initially present with given concentration and conductivity, then an equal volume of given concentration of HCl is added and the final conductivity is given, again a ...
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Is this true for conductivity of mixture of two solutions equal to the sum of conductivities of each solution?
Suppose $\ce{Na2SO4}$ has a conductivity $\pu{2.6 \times 10^{-4} S cm-1}$ and on mixing $\ce{CaSO4}$ to saturation, the conductivity becomes $\pu{7.0 \times 10^{-4} S cm-1}$.
So, Is the conductivity ...
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Determination of Cell constant
I read that cell constant is measured indirectly using a solution with known conductivity(like KCl).
But then how was the conductivity of that solution measured? (Is it by some theoretical ...
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aluminum hydroxide as an electrolyte
A friend and I recently produced some aluminum hydroxide, $\ce{Al(OH)3}$ for a project, and we wondered how it functions as an electrolyte. We know it has a low conductivity and solubility, but we ...
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How do the ions in electrolytes lead to lower dielectric constants compared to pure water?
I am interested in the salts used in the gel electrophoresis buffers. As I understand it, one of their roles is to change the conductivity of the medium, because otherwise the electric field would be ...
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What has caused a plateau in the lead up to the equivalence point of a conductometric titration?
In a titration of HCl against NH3OH, conductivity had increased in a linear fashion (think y=x), and before it approached the equivalence point, there was approximately 0.8mL of 'plateau'. Before ...
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A gram of salt added to pure (distilled) water introduces around $2 \times 10^{22}$ ions? [closed]
I am currently studying Practical Electronics For Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5.2 Resistivity and Conductivity, claims the following:
Adding an ionic compound in the ...
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Which conductivity law should I use to calculate the conductivity of a solution with high/low concentration?
I have a set of NaCl solutions with concentrations ranging from 0.05 M to 0.1 M.
I have been trying to calculate the conductivity of these solutions and compare the obtained values with the ...
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Specific conductance of 0.1 M acetic acid
Find specific conductance of $\pu{0.1 M}$ acetic acid given that its molar conductivity is $\pu{4.6 S cm^2 mol^-1}$.
I used the formula $\Lambda_\mathrm m = \kappa/c$, where $\Lambda_\mathrm m$ is ...
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Calculating conductivity of a solution given molar conductivities and concentration
From my understanding the conductivity of a solution ($K$) is given by the sum of the conductivities of ions in solution:
$$K = c(K_{m,1}+K_{m,2})$$
Where $c$ is the concentration, and $k_{m1}$ and $...
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Electric conductivity vs potential
What is the relationship between electric potential and conductivity?
For example, gold has a more negative electric potential than silver (-1.100 vs -0.800), but silver is a better conductor.
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Understanding strong acid titrated with weak base graph
I don’t understand why the conductivity doesn’t change after the equivalence point. To my understanding, at the equivalence point there is $\ce{NH3}$, $\ce{NH4+}$ and $\ce{Cl-}$ in the solution. As ...
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Conductivity of molten or aqueous salts [closed]
If there is a 1M aqueous solution of 1 liter NaCl (aq), and the molar conductivities of the solution and the chloride ions were found to be $x$ and $y$ respectively, is it accurate to say that the ...
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Feasibility of using ionic liquid fuels in an MHD type reactor
First off I would like to say that my knowledge on chemistry, even general chemistry, is basic if not poor.
That said, I have some intuituions on this matter. I haven´t found any paper regarding ...
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Silver in defect chemistry
When talking about conductivity in combination with lattice defects you can often see that AgX is taken as an example for a Frenkel defect where the $\ce{Ag^+}$ moves to intersticial voids. I remember ...
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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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Thermal conductivity and diffusivity of diatomite (also known as diatomaceous earth or kieselguhr) [closed]
Does anyone know where can I find measured thermal conductivity and thermal diffusivity of diatomite for different temperatures? I'm looking for the temperature dependency for temperatures higher than ...
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Why is the conductivity of NaCl, NaBr and NaI decreasing with temperature?
I collected the conductivity of NaCl, NaBr, and NaI from 30 celsius to 80 celsius. I used the solutions mixed in water.
In all instances, the conductivity seemed to reduce as the temperature increased....
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What is the highest temperature, ambient pressure type-1 superconductor as of 2022?
I was curious about the highest known Tc for type 1 superconductors.
This list suggests lead near 7K is as good as it gets for type-1 superconductors but I wonder if that is true given the current ...
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Descriptive explanation of different Carbon Nanotubes Conductivity
I'm soon having a talk about Carbon Nanotube FETs and wanted to give a short introduction into CNTs in general. Of course for device operation it's important that some types of single-walled CNTs are ...
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Ionic mobilities and conductivities of lithium and potassium cations in acetonitrile–propylene carbonate solution
Recently I calculated the ionic mobility and molar ionic conductivity values for $\ce{Li+}$ and $\ce{K+}$ cations in an acetonitrile–propylene carbonate binary mix solution (8:2 molar fraction ratio).
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Can alkali-doped exohedral fullerene molecules show superconducivity?
Alkali doped fullerenes are one of the few organic materials that show superconductivity. However, when attaching a new molecular system to a fullerene doped with an alkali metal, will it still show ...
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High symmetry points and x-coordinates
Is it possible to work out the x-coordinates related to high symmetry points?
The software I'm using doesn't provide me with that, so I was wondering if there is a way to manually figure it out, as I ...
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Is there a relation between polarity of molecules and their electric susceptibility?
So it is written in our text that electric susceptibility ($χe$) (the response of say water molecules in the presence of an external electric field) is related to the molecular behaviour of various ...
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Pressure vs electric conductivity in solids
If we apply pressure to a solid, does it change its electric conductivity? I am asking this because in 2020 they announced a superconductor at room temperature but under a pressure of 3/4 of the ...
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Why do 4d and 5d metals have more orbital overlap than 3d because of size?
When considering the electrical conductivity of metal oxides, they will conduct better if the metals orbitals can reach each other to overlap. Whether this can happen is contributed to by a couple of ...
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Molar conductivities of aqueous electrolytes at 1 M
In the following table from the CRC Handbook, molar conductivities of aqueous electrolytes are given for concentrations from infinite dilution to 0.1 M. However, I am looking for values at 1 M, and I'...
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“Good” properties of transparent conducting oxides
I'm a computer scientist and I'm trying to figure out which are the key properties that define a “good” acting transparent conducting oxide (TCO) in order to consider several possible features to ...
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Molar conductivity of coordination compound [duplicate]
The compound is $\ce{[Cr(H2O)6]Cl3}$. Which isomer has least molar conductivity ?
Correct answer : $\ce{[Cr(H2O)4Cl2]Cl.2H2O}$
My answer : $\ce{[Cr(H2O)3Cl3].3H2O}$
Molar conductivity is directly ...
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Conductometric titration curve when KCl is gradually added to AgCl solution [closed]
The situation given is that we are performing conductometric titration where KCl is gradually added to AgCl solution and we have to plot the variation of conductivity with the volume of aq. KCl added. ...
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Water replacement for pressure-testing [closed]
Due to circumstance, our Data Centre build has some delays and it currently looks like we're going to have to perform a hydrostatic test of our sprinkler system with live computers in it.
As I have ...
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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 ...
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Which is more conducting - molten sodium chloride or molten magnesium chloride? [closed]
Which is more conducting - molten sodium chloride or molten magnesium chloride?
I'm pretty sure I know the answer to this but my problem is putting into words. Magnesium is more conductive due to its ...
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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 ...
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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 ...
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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 ...
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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 ...
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Proper definitions of resistivity of conductivity
Is resistivity the same as specific electrical resistance?
And conductivity is same as specific conductance when I am dealing with electrical properties ?
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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 ...
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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?
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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,...
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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 ...
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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{...
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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 ...