Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [conductivity]

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

1
vote
1answer
20 views

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 ...
2
votes
1answer
32 views

Intensive and Extensive Properties--Resistance

Is resistance an intensive quantity or an extensive one? And why? Let me present 2 scenarios. Resistance of a wire: The resistance of a wire depends on area and length. This implies it depends on the ...
0
votes
1answer
42 views

How to measure the electrical conductivity of a substance? [closed]

Suppose you are given these substances: $\ce{NaOH(aq)}$ $\ce{HCl(aq) }$ $\ce{C6H12O6(aq) }$ $\ce{NH3(l)}$ Are there rules to figure out how conductive each compound is? Is it based on ...
0
votes
1answer
44 views

Do the salt bridge ions have to match the ions in the half-cells solutions?

Does the salt bridge in a galvanic cell have to have the same ions as the ones in the solutions? E.g. does it need to have nitrate ions if the half-cells contain copper nitrate and zinc nitrate, or ...
11
votes
4answers
273 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
votes
2answers
312 views

Decrease in temperature of a aqueous salt solution decreases conductivity

Why does the conductivity of a water solution drop as the temperature decreases? How are these two related?
1
vote
1answer
28 views

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 ...
6
votes
1answer
91 views

If liquid hydrogen fluoride autoionises, how can it be an insulator?

According to Wikipedia, one of the last major hurdles in the isolation of elemental fluorine was the need to mix hydrogen fluoride with another substance in order for its electrolysis to be possible (...
1
vote
1answer
65 views

Is the electrical conductivity only measurable in aqueous solutions? [closed]

I have been looking for other ways to measure it, but all I've found is through aqueous solutions. So I want to know if there's another way to do it, or why it isn't possible through other means.
0
votes
1answer
65 views

The Conductivity of Electrolytes based on structure of Ionic Crystal [closed]

Background I want to run an experiment to test the conductivity of various ionic compounds dissolved in water. I was hoping to see some sort of trend in the increase/decrease of conductivity based ...
1
vote
1answer
2k views

Difference between equivalent conductance and equivalent conductivity [closed]

I find questions in my book which ask for the equivalent conductivity and sometimes for the equivalent conductance. And then when I look at the solution, they've used the same formula for both. This ...
1
vote
0answers
222 views

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 ...
2
votes
1answer
70 views

Why do metallic elements have a very small band gap while nonmetallic elements have a large band gap?

I recently was going over solid state bonding and conductivity. I was wondering why metallic elements (such as sodium, iron, etc.) have a small band gap / no band gap (as conductors that have the ...
-6
votes
1answer
2k views

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 ...
2
votes
1answer
371 views

Why are silicon and germanium used as semiconductors but not other metalloids?

The semiconductor materials are either elementary such as silicon and germanium or compound such as gallium arsenide. Silicon is the most used semiconductor for discrete devices and integrated ...
-1
votes
2answers
320 views

Does titanium(II) oxide conduct electricity? [duplicate]

In my book, it is given that $\ce{TiO(s)}$ is an electrical conductor. But I'd think that since $\ce{TiO(s)}$ is ionic and in solid state, it shouldn't conduct electricity. So, why does it conduct ...
1
vote
0answers
533 views

Does ethanol conduct electricity? [duplicate]

I am trying to find out about methylated spirts/denatured alcohol. As far as I can fine, methylated spirits is roughly 95% ethanol. Will it conduct electricity? I have done some research, but I have ...
-1
votes
1answer
131 views

Which solution is more conductive

Which of the following solutions is more conductive: 1) 0.1 M sodium hydroxide and 0.1 M hydrochloric acid mixture (effectively NaCl?) 2) 0.1 M sodium hydroxide and 0.1 M acetic acid mixture (...
1
vote
0answers
45 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 ...
7
votes
0answers
963 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 ...
-1
votes
1answer
151 views

Relation of conductivity with electrode distance [closed]

Conductivity is defined as the conduction of ions when the distance between the electrodes is 1 cm and length is 1 cm. Say for instance we have a solution where the distance between the electrodes is ...
1
vote
0answers
30 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
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. ...
6
votes
0answers
179 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 ...
2
votes
0answers
60 views

Molar Conductivities of H+ and OH- V/S other Ionic Electrolytes [duplicate]

The following table gives the Ionic Molar Conductivities of a few electrolytes in water. What are the reasons for the unusually high values for both H$^+$ and OH$^-$ even though both undergo solvation ...
1
vote
0answers
106 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
1answer
591 views

How is solid titanium(II) oxide an electrical conductor?

Most salts in the solid state are electrical insulators, since the ions are not mobile (e.g. sodium chloride). However, solid titanium(II) oxide, $\ce{TiO (s)}$, is a conductor. How is this so?
1
vote
0answers
365 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 ...
4
votes
1answer
447 views

How can I calculate the molar conductivity of a solution with multiple solutes?

I'm running an experiment mixing 2 different solutions, $\pu{5 mL}$ of $\pu{0.1 M}$ $\ce{NaCl}$ with $\pu{5 mL}$ of $\pu{0.1 M}$ $\ce{KCl}$. I am measuring the conductivity of the total solution in $\...
4
votes
1answer
241 views

Why does the conductivity of a LiOH solution decrease when boric acid is added?

If I start with pure water and add $\ce{LiOH}$ the conductivity of solution increases. However, if I then dissolve boric acid in the same solution the conductivity falls. I would have thought adding ...
0
votes
1answer
811 views

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 ...
2
votes
0answers
115 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 ...
4
votes
1answer
106 views

Would a quarternary ammonium electride conduct electricity?

If suppose, I crystallised a quarternary ammonium electride could this conduct electricity similar to a metallic conductor? Metals have lattice atoms as charged metal ions are a sea of electrons. This ...
1
vote
1answer
5k views

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 $...
0
votes
1answer
170 views

Logical reasoning behind the formula for molar conductance of an electrolyte [closed]

I am studying some introductory material on electrochemistry. My book and all standard websites I've found define the molar conductance of an electrolyte as "conductivity of an electrolyte solution ...
2
votes
0answers
77 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 ...
4
votes
1answer
74 views

What is A in the following equation

This equation describes the total current in bulk solution in a battery caused by migration in the electrolyte. Then the source says what A is: In the bulk solution (away from the electrode), ...
3
votes
0answers
284 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 \...
10
votes
1answer
270 views

Why are isotopically pure diamonds 50% more thermally conductive than other diamonds?

A laboratory grown type-IIa diamond (no nitrogen defects) has a lambda of $\pu{1800-2200 W/mK}$, but an isotopically pure diamond of $\ce{^{12}C}$ can have up to $\pu{3320 W/mK}$. Why are $\ce{^{12}C}...
3
votes
2answers
573 views

Are there compounds more conductive than Silver (Ag)?

Silver is the most electrically conductive element on the Periodic Table. However, I am interested in knowing if there are any compounds (combinations of elements) that would be more conductive than ...
9
votes
2answers
443 views

Why do we do electrolysis and electroplating using warm electrolyte?

This is a pretty basic question, and I know it has something to do with conductivity, but I'm not quite sure how they are related.
0
votes
1answer
3k views

Calculate limiting molar conductivity of BaCl2

How can I calculate limiting molar conductivity of BaCl2 in water at 25 degree Celsius? I have got a formula for calculating limiting molar conductivity . limiting molar conductivity = V+ A+ + ...
1
vote
1answer
126 views

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 ?
1
vote
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
2answers
7k views

Why is fullerene 60 an insulator while graphite is a conductor?

Graphite is good conductor of electricity because one carbon atom is bonded only three carbon atoms, which enables the presence of free electrons. In fullerene 60 the carbon atoms are also bonded to ...
0
votes
0answers
121 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 ...
4
votes
1answer
894 views

Finding out pKa of acid from molar conductivity

I'm reading about the electrical properties of solution where there is a problem like that: The molar conductivity of $0.0250\ \mathrm M$ $\ce{HCOOH(aq)}$ is $4.61\ \mathrm{mS\ m^2\ mol^{-1}}$. ...
4
votes
1answer
97 views

What kind of unit is this [A*m^2/mol]?

I found a term on this website that gives a unit of [A*m^2/mol]. The equation is: $k_d^{eff}=\frac{2RT\kappa^{eff}}{F}(t^+-1)\left(1+\frac{\text{d}\ln(f)}{\text{d}\ln(c)}\right)$ where R is the gas ...
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?