1) Solid sodium iodide does not conduct electricity. Why does a sodium iodide solution conduct electricity?
2) When sodium iodide is electrolyzed, iodine is formed at the positive electrode. Complete and balance the half-equation for the formation of iodine:
\[ 2 \text{I}^- \rightarrow \text{I}_2 + 2 \text{e}^- \]
3) What is formed at the negative electrode when sodium iodide solution is electrolyzed? Explain why.
Answer (3)
the solution conducts electricity because it has free delocalized which are free to move.
Solid sodium iodide does not conduct electricity in solid form but conducts in solution due to ion movement. The half equation for iodine formation is provided, and hydrogen gas forms at the negative electrode during electrolysis. ;
Solid sodium iodide does not conduct electricity due to its rigid structure, but in solution, it conducts electricity because the ions can move freely. The balanced half-equation for iodine formation is 2 I − → I 2 + 2 e − , and at the cathode during electrolysis, hydrogen gas is formed. This is because water molecules are reduced, releasing hydrogen gas and hydroxide ions.
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