Questions tagged [conductivity]

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

Filter by
Sorted by
Tagged with
0 votes
0 answers
25 views

Why is polystyrene (PS) an electrical insulator

The reason behind why graphite is electrically conductive is as ancient as the age of the Queen: that, electrons inside the benzene ring are delocalised. However, if one looks the repeating unit of ...
user avatar
0 votes
0 answers
17 views

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 ...
user avatar
  • 33
0 votes
0 answers
60 views

Why electrolytic conduction increases with increase in temperature?

I came to know that electrolytic conduction increases with increase in temperature whereas metallic conduction decreases. But if increase in temperature increases the random motion of the ions then ...
user avatar
0 votes
0 answers
21 views

Commercially available conductive polymers

I am looking for intrinsically conductive plastics (not plastics that are made conductive by filling them with carbon black for example). I have found that there are conductive polymers like ...
user avatar
  • 41
0 votes
0 answers
20 views

Why ppm500 water TDS scale is used and how accurate it is?

So, most TDS meters, it seems, uses this scale. To qoute: The conversion from EC to ppm is as follows: ppm500 = EC x 500 ppm700 = EC x 700 Some examples of how ...
user avatar
4 votes
1 answer
135 views

Molar conductivity calculation in a titration curve

At an exam for analytical chemistry, I was asked to calculate the molar conductivity of a solution for an ongoing titration. I just solved it the way our professor showed it to us but I have some ...
user avatar
0 votes
0 answers
20 views

Literature recommendation - non-stationary heat transfer in porous solids

I am trying to calculate a non-stationary heat transfer to a porous spheres by conduction. These spheres are placed in a thin metal tubes with a known heat capacity. Hot/cold air (or similar gaseous ...
user avatar
  • 123
0 votes
1 answer
51 views

Why does temperature increase rate of electrolysis even though resistivity of electrodes increase?

My experiment is just the electrolysis of iron rust at different temperatures. It consists of a rusted iron cathode and an iron anode in a salt water solution. From my data, there is an approximately ...
user avatar
1 vote
0 answers
34 views

Why is 1413 µS/cm specifically the "standard" conductivity standard?

I'm doing some work on conductivity sensor calibration, and noticed that all the conductivity standard suppliers offer a 1413 µS/cm standard solution. Why is this oddly specific value the "...
user avatar
2 votes
0 answers
45 views

Characteristics of metals compatible with semiconductor grade Ultra Pure Water (UPW)?

I am looking to build a water conductivity sensor for semiconductor grade Ultra Pure Water (UPW). UPW conductivity sensors already exist, but because of price and low water volume I need to fabricate ...
user avatar
-1 votes
1 answer
57 views

Why doesn't NaCl work for electrolysis? [closed]

So I found out online that to increase the conductivity of water for electrolysis, NaCl or NaOH is used. However, upon using a low amount of NaCl in water and passing 12V through the solution, I ...
user avatar
0 votes
1 answer
173 views

Why is copper a better conductor of electricity than calcium?

How would we compare the electrical conductivity between copper and calcium? I understand that electrical conductivity of a metal is dependent on the number of delocalized electrons for that metal. ...
user avatar
  • 132
1 vote
1 answer
117 views

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 ...
user avatar
1 vote
0 answers
79 views

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). ...
user avatar
  • 49
2 votes
0 answers
120 views

Why does conductivity of a solution of sodium in liquid ammonia decrease with a decrease in temperature?

What happens to the conductivity when a solution of sodium in liquid ammonia at $\pu{-33^{\circ}C}$ (Boiling point of ammonia) is further cooled? I expected the solution to behave as any other ...
user avatar
1 vote
0 answers
34 views

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 ...
user avatar
16 votes
1 answer
1k views

Why does the graph of the electrical conductivity of sulfuric acid/water solutions have this knee in the ~85%-~92% range?

This answer to an earlier question regarding the electrical conductivity of sulfuric acid provides a graph showing the conductivity of sulfuric acid/water mixtures ranging from 0% to 100% sulfuric ...
user avatar
  • 459
22 votes
3 answers
2k views

Is "Sulfuric acid... makes a poor electrolyte... very little of it will dissociate into ions" really true? What does that actually mean?

While researching chromate conversion coating for edits to this answer in Space Exploration SE, I came upon the following passage in Corrosion Resistance of Stainless Steel to Sulfuric Acid Sulfuric ...
user avatar
  • 6,112
1 vote
0 answers
43 views

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 ...
user avatar
  • 11
1 vote
0 answers
75 views

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 ...
user avatar
6 votes
1 answer
156 views

How exactly does electrolysis occur if the molar conductivities of cation and anion are different?

I'm having trouble wrapping my head around Kohlrausch law of infinite dilution and molar conductivities in general. For a salt $\ce{AB}$ the molar conductivity at infinite dilution can be expressed as ...
user avatar
2 votes
2 answers
219 views

Temperature Dependence of The Conductivity of Electrolytic Solutions

I have learned in my chemistry text books that the conductivity of electrolytic solutions increase with the increasing of temperature because the ions of electrolytic solution move faster by getting ...
user avatar
1 vote
0 answers
62 views

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 ...
user avatar
0 votes
2 answers
124 views

Conversion factor for conductivity of an aqueous solution [closed]

I am not 100% sure if this is the right place to ask, but please point me in the right direction if not. I am designing a conductivity meter, and when it comes to displaying the results in mS/cm or µS/...
user avatar
  • 119
1 vote
0 answers
214 views

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 ...
user avatar
4 votes
0 answers
96 views

Why is ruthenium dioxide a conductor while titanium dioxide is an insulator?

Ruthenium dioxide has the same crystal structure as rutile (titanium dioxide), and the metal atoms are in the same oxidation state. Yet ruthenium dioxide is a metal-like conductor (its resistivity is ...
user avatar
  • 213
6 votes
1 answer
936 views

Why does the specific conductivity against concentration curve for NaCl curve more than KCl?

I understand why KCl has a higher specific conductivity than NaCl.. but I dont understand why the curvature is more significant for NaCl (KCl is a straight line). Ive provided a picture of this here, ...
user avatar
  • 81
6 votes
2 answers
160 views

How to relate the conductance of an aqueous electrolyte to its conductivity

In this answer on Physics Stack Exchange, the author states that conductance $G$ is related to conductivity $\sigma$ by $$G = \sigma\frac{A}{l}$$ where $A$ is the cross-sectional area perpendicular to ...
user avatar
  • 1,023
0 votes
2 answers
389 views

Precise estimation of air properties as a function of temperature at 1 atm

Are there any tables with empirical equations to calculate properties of air as a function of a temperature at 1 atm? For example, NIST provides such equations for a large number of gases, but I was ...
user avatar
  • 123
1 vote
2 answers
1k views

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 ...
user avatar
  • 123
1 vote
1 answer
479 views

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 ...
user avatar
1 vote
0 answers
37 views

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'...
user avatar
  • 1,023
3 votes
1 answer
180 views

How to compare electrical conductivity of ionic liquids and aqueous electrolytes

I am trying to compare the electrical conductivity of selected ionic liquids (ILs) and aqueous electrolytes. By ionic liquid (IL), I mean a pure IL -- no water. Electrical conductivity of ILs is ...
user avatar
  • 1,023
2 votes
0 answers
47 views

Why does the molar conductivity plot behave this way?

On the left image.. we see that specific conductivity is increasing at a decreasing rate, eventually plateauing as it reaches a maximum. I am unable to reconcile this with the molar conductivity graph ...
user avatar
  • 81
1 vote
0 answers
39 views

“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 ...
user avatar
0 votes
0 answers
70 views

How does the cation radius affect the rate of increase of the electrical conductivity of a salt in aqueous solution?

Potassium chloride has a greater ionic radius than sodium chloride. How does this affect the fall in rate of increase in conductivity as concentration concentrations? I know the following factors ...
user avatar
1 vote
1 answer
359 views

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 ...
user avatar
1 vote
1 answer
97 views

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? ...
user avatar
2 votes
0 answers
112 views

Molar conductivity in compounds showing coordination isomerism

Question Which of the following complex has lowest molar conductivity? $\ce{[Co(NH3)6][Cr(NO2)6]}$ $\ce{[Cr(NH3)5(NO2)][Co(NH3)(NO2)5]}$ $\ce{[Cr(NH3)4(NO2)2][Co(NH3)2(NO2)4]}$ $\ce{[Co(NH3)5(NO2)][...
user avatar
1 vote
1 answer
867 views

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 ...
user avatar
1 vote
1 answer
72 views

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 ...
user avatar
-1 votes
1 answer
352 views

Conductometric titrations: dilution effect

Since the conductivity of a solution changes linearly with the electrolyte concentration, during a conductometric titration the volume increases with each addition of the titrant aliquot. For this ...
user avatar
-1 votes
2 answers
202 views

Why we do not add salt water to the batteries instead of acid? [closed]

Actually I was just thinking that since we add acid to the batteries to increase the conductivity but the thought simply crossed my mind that salt are strong electrolytes so there should be a good ...
user avatar
0 votes
1 answer
327 views

How does electrolytic conductance depend on solvation?

My textbook says: If the ions are strongly solvated their effective size will increase and hence their conductance will decrease P.s after reading my textbook, I don't think I'm sure what solvation ...
user avatar
  • 151
1 vote
1 answer
80 views

Contradiction in variation of conductance and conductivity on dilution

I do conceptually understand that on dilution conductivity decreases and conductance increases but if we look at the formula of conductivity, a contradiction seems to arise. $$\kappa=GG^*$$ where $\...
user avatar
-2 votes
1 answer
794 views

Why does molar conductivity depend on the volume of the solution? [closed]

I have been searching the answer to this question everywhere and (almost) the only answer I get is to formula based: ‘Since molar conductivity = k / M = k/1/V for one mole = kV Therefore molar ...
user avatar
1 vote
1 answer
63 views

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 ...
user avatar
  • 1,035
1 vote
2 answers
305 views

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. ...
user avatar
2 votes
0 answers
100 views

Specific conductance of KCl

Question: A conductivity cell containing distilled water has a resistance of $\pu{454 k \Omega},$ while the same cell containing $\ce{KCl}$ solution prepared in the same sample of water shows ...
user avatar
1 vote
0 answers
434 views

Electrical conductivity and the limits of Kohlrausch's law

I am currently writing a lab report on electrical conductance and I realized that my partner prepared $\pu{0.1 M}$ solution instead of $\pu{0.01 M}$. Now, I am supposed to find the molar conductivity ...
user avatar
  • 109