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

The best known conducting aqueous solutions are that of strong acids in water because the hydronium ion (=protonated water) has the highest electrical conductivity known today. The infinite dilution ...
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20 votes
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Why does the graph of the electrical conductivity of sulfuric acid/water solutions have this knee in the ~85%-~92% range?

The comment by Vikki made me dig even older papers. Since conductance (not conducitivity note that Darling is using an incorrect terminology from today's standards) is inversely related to viscosity, ...
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15 votes
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Why are ionic compounds bad conductors of electricity in solid state?

Electric charge is transferred by physically moving charged particles around. In the case of an electric current moving through a wire (for example), the electrons are moving. In an ionic compound, ...
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15 votes

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

The conductivity might be viewed relative to other electrolytes and by concentration. By concentration: Up to about 25% $\ce{H2SO4:H2O}$, conductivity increases fairly linearly with concentration, ...
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13 votes
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Conductivity as a function of acid concentration

At low concentration, conductivity is proportional to concentration (a linear relationship). Each ion will have its own unique mobility, as discovered by Kohlrausch. $\ce{H+}$ has the highest ...
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12 votes

Why is copper a better conductor than iron?

This is, ultimately, a question on solid state physics rather than chemistry. Further, the OP indicates that they are in high school, which kind of limits the depth of the answer that might be useful ...
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12 votes
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What is the difference between molar conductance and molar conductivity?

I can understand your frustration. The use of terminology is often inconsistent and confused (much to my chagrin). I think you've got the general idea, the conductance ($G$) can be defined as follows: ...
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11 votes
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Graphene Vs Copper?

The trick with graphene is that a lot of its amazing properties only work when you have continuous perfect sheets of it, and making graphene like this is currently beyond us, for large scales anyways. ...
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10 votes
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Does the delocalization of p-orbitals ensure conductivity?

Delocalized $\pi$ orbitals do allow for mobile charges. The catch there is "allow." Just because these systems can have mobile charges does not make them conductive. Conductivity can be defined as: $\...
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9 votes

Why conductivity of electrolyte decreases on dilution, but molar conductivity increases?

I've just been doing an experiment on this, and my understanding's not that great, but as I understand it the conductivity decreases because you have a lower concentration of charge carriers in the ...
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8 votes

What solvent would have the fewest ions?

2-Methylpropane has a $\mathrm{p}K_\mathrm{a}$ of 53 ($\mathrm{p}K_\mathrm{a}$ table). That sounds pretty non-ionic. Can't think of any common all-carbon (no substituents of any kind) liquid ...
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8 votes
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What is the unit of molar conductivity?

Molar conductivity is defined as the conductivity of an electrolyte solution divided by the molar concentration of the electrolyte, and so measures the efficiency with which a given electrolyte ...
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8 votes

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

To reiterate Ivan's comment fullerene is a bad conductor because that's what the measured properties produce as a result. The mechanism that makes it a bad conductor is that it has shorter range ...
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8 votes

Why do we do electrolysis and electroplating using warm electrolyte?

ringo makes good points in his answer. Additionally, though, the increased temperature enhances mass transfer of ions to/from the electrode surfaces by at least two mechanisms: Higher temperature ...
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8 votes
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Would a quarternary ammonium electride conduct electricity?

You can't conclude that by thinking alone; some experiments are necessary. True, an electron in an electride is kinda "free", in that it isn't connected to any particular atom. But that doesn't mean ...
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7 votes
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Why do we do electrolysis and electroplating using warm electrolyte?

The reasoning here is two-fold. The solubility of most electrolytes increases with temperature, and water's ionization constant also increases with temperature. On the whole this means more ions, and ...
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7 votes
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Is there any electronic component to water conductivity?

I agree with the commenters that electrical conduction is very unlikely, but it's worth going through some possible mechanisms: actual solvated electrons: As others have noted, free electrons would ...
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6 votes

Conductivity as a function of acid concentration

Your carefully plotted results seem in line with this table from the Foxboro Company. Though there are references that give a simple square-root relationship, they are clearly wrong at high ...
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6 votes

Why is it that the least reactive metals are the best electrical conductors?

One of the reasons why non reactive metals are good conductors is that they are good at staying as metals. Most metals react with the atmosphere to form oxides. And the majority of oxides are ...
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6 votes

Conductivity as a function of acid concentration

To expound on DavePhD's nice answer, molar conductivity follows Kolrausch's law, $\Lambda_m=\Lambda_m^{\circ} - \kappa \sqrt{c}$ at low concentrations, which means that extensive conductivity follows $...
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6 votes

Does an electrically conductive gas exist at room conditions?

It depends on what you are prepared to consider a gas and what you are prepared to consider room conditions. The gas inside all discharge lamps (fluorescent lamps and neon lamps in shop signs, for ...
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6 votes

Does an electrically conductive gas exist at room conditions?

Air at STP does conduct a tiny bit due to ionization by cosmic rays; this might even provide a path for lightning leaders. "Alex V. Gurevich of the Lebedev Physical Institute [et al] suggest that... ...
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6 votes
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Why does Ga improve conductivity of Ge?

This questions has two parts if you look closely: Which of the following elements is important in the semiconductor industry to improve the conductivity of Ge? All of the above will improve the ...
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6 votes
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Why is AC current used rather than DC current for calculating the conductance of a solution(see body)?

When a current is passed through an electrolyte, a chemical reaction takes place. This alters the composition of the solution over time and you won't actually be measuring the conductivity(or ...
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6 votes

Decrease in temperature of an aqueous salt solution decreases conductivity

Decrease in temperature has two effects, both attributing to lower electrolytic conductivity: decreases the mobility of the charge carriers (e.g. $\ce{H3O+}$ and $\ce{OH-}$ for pure water); ...
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6 votes
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Decrease in temperature of an aqueous salt solution decreases conductivity

According to the Stokes-Einstein-Debye theory, and assuming the ionic composition remains constant (say for a fully dissociated salt), the main factor accounting for the response of the conductivity ...
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6 votes

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

The answer is quite simple, if you look at the equation carefully. Conductance and conductivity are related by cell constant, $\displaystyle\frac{\text{Area}}{\text{Distance}},$ where the area is the ...
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6 votes

Conductometric titration curve plotting

Expressed in $\pu{\Omega ^{-1} cm^2 mol^{-1}}$, the ionic conductance of usual ions like $\ce{Na+, K+, Ca^{2+}, Cl-, SO4^{2-}}$ are between $50$ and $80$. But the two ions $\ce{H+}$ and $\ce{OH-}$ ...
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