The compound zinc iodide is a strong electrolyte because it dissociates into the solution easily and also conducts easily.
A strong electrolyte is a solute or solution that is an electrolyte that completely dissociates in solution. The solution will usually contain only ions and no molecules of the electrolyte. Strong electrolytes are good conductors of electricity, but only in aqueous solutions or in molten form. The comparative strength of an electrolyte may be understood using a galvanic cell. The stronger the electrolyte, the greater the voltage produced.
The dissociation of a strong electrolyte is generally by its reaction arrow, which only points toward products. In contrast, the reaction arrow of a weak electrolyte points in both directions.
The general form of the strong electrolyte equation is:
strong electrolyte (aq) → cation+ (aq) + anion- (aq)
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