Given mercury, diamond, hexanes, a solution of sodium chloride, water, plastic, and solid potassium chloride, WHICH substances are electrical conductors?

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Given mercury, diamond, hexanes, a solution of sodium chloride, water, plastic, and solid potassium chloride, WHICH substances are electrical conductors?

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Answer 1 · 2017-08-13T17:45:52

$Conductors:$ $"Conductors:"$ $Mercury;$ $"Mercury;"$ $NaCl(aq);$ $"NaCl(aq);"$ $Aluminum;$ $"Aluminum;"$ $Herbert von Karajan$ $"Herbert von Karajan"$

Explanation:

$Conductors:$ $"Conductors:"$ $Mercury;$ $"Mercury;"$ $NaCl(aq);$ $"NaCl(aq);"$ $Aluminum;$ $"Aluminum;"$

$Non-conductors:$ $"Non-conductors:"$ $Hexanes (petrol);$ $"Hexanes (petrol);"$ $H_{2} O;$ $H_2O";"$ $plastic;$ $"plastic;"$ $diamond;$ $"diamond;"$ $K C l (s)$ $KCl(s)$

Conductivity depends on free electrons or charged particles that are free to move. $N a C l (a q)$ $NaCl(aq)$ has got the latter, but $K C l (s)$ $KCl(s)$ ain't got it.

An electrolyte is a material that produces an electrically conductive solution when dissolved in an aqueous solution. $N a C l$ $NaCl$ has this property, and so does $K C l$ $KCl$ WHEN DISSOLVED in an aqueous solution.

Clearly, hexanes, plastic, and diamond are also non-electrolytes. Water is very weakly electrolytic due to the autoprotolysis reaction:

$2 H_{2} O (l) ⇌ H_{3} O^{+} + H O^{-}$ $2H_2O(l)rightleftharpoonsH_3O^+ + HO^-$

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Given mercury, diamond, hexanes, a solution of sodium chloride, water, plastic, and solid potassium chloride, WHICH substances are electrical conductors?

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