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3 votes
Accepted

Electrical properties of glycol / water mixtures

Disclaimer: I am no conductivity modelling expert so take what follows with a grain of salt. Also do not hesitate to comment this answer, and I will try to improve it accordingly. Your question ...
mranvick's user avatar
  • 536
3 votes

Which reaction occurs in calcium vanadate when it comes in contact with water?

If you mean $\ce{Ca}\left( \ce{V}\ce{O_{3}} \right)_{2}$ aka $\ce{Ca} \ce{V_{2}}\ce{O_{6}}$ then $\ce{Ca} \ce{V_{2}}\ce{O_{6}} + 2 \cdot \ce{H_{2}}\ce{O} \to \ce{Ca^{2+}} + 2 \cdot \ce{H_{2}}\ce{V}\ce{...
Kevin Dietrich's user avatar
2 votes

Can electrical conductivity be measured by colorimetric or photospectrometrical method?

A chromogenic polymer-based material with properties very similar to what you are seeking has been developed by the authors of Ref. 1. The color of the partially sulfonated polystyrene particles ...
Buck Thorn's user avatar
  • 22.3k
2 votes

How do the ions in electrolytes lead to lower dielectric constants compared to pure water?

An electric dipole with a dipole moment $\vec{p}$ in an electric field $\vec{E}$ has the energy : $\Delta E = - \vec{p}.\vec{E}$. This energy is minimal if the dipole moment and the field are aligned. ...
M06-2x's user avatar
  • 563
1 vote

Temperature and electrolysis

Based on my understanding, metals conduct electricity better at lower temperatures than at higher temperatures as the resistance to electron flow is lower. This statement is correct, the conductivity ...
M06-2x's user avatar
  • 563
1 vote
Accepted

How do I show that a transition is electric dipole allowed with group theory/symmetry?

I found the reply in the book by Dresselhaus. See also discussion here: https://arxiv.org/abs/2211.12241 $T_{1u}$ transforms like $(x,y,z)$ I assume that selecting the pump polarization along $x$, I ...
Davide Sangalli's user avatar
1 vote

Why is copper a better conductor of electricity than calcium?

Comparing the conductivities must start with some data - then you start dealing with explanations. Otherwise, you are making predictions - no, not predictions - speculations. Get some data first, then ...
James Gaidis's user avatar
1 vote

How is graphene electrically conductive?

Graphene and graphite have delocalised electrons The root of your misunderstanding appears to be the assumptions that the bonding in structures like graphene can be accurately represented by drawing ...
matt_black's user avatar
  • 36.8k

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