Interpretation:
The molecular art that represents a solution of potassium iodide in water has to be identified. The reason has to be explained and conduction of electricity by the solution has to be predicted.
Concept Introduction:
A substance that conducts electricity in water is called as electrolyte and substance that does not conduct electricity in water is called as nonelectrolyte.
Strong electrolyte: An electrolyte that completely dissociates to form ions, when it dissolves in water is called as strong electrolyte.
Weak electrolyte: An electrolyte in which molecules (a small fraction) forms ions, when dissolves in water to give largely uncharged molecules is called as weak electrolyte.
Explanation of Solution
Potassium iodide is an ionic compound, hence separation of ions will takes place when they are dissolved in water.
Figure A represents the solution of potassium iodide in water because the ions of potassium and iodine are separated when potassium iodide is dissolved in water. Yes, the solution of potassium iodide in water conducts electricity due to the presence of ions. Hence, it is best molecular art representation of potassium iodide solution in water.
Figure B represents the molecule of potassium iodide (without being separated into ions). Hence, it cannot be correct representation.
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Chapter 7 Solutions
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