Molten NaCl conducts electricity due to the presence of_______________?
Correct answer: C. Free ions
- A. Free electrons
- B. Free molecules
- C. Free ions
- D. Atoms of Na and Cl
Explanation
Molten NaCl contains mobile Na+ and Cl- ions, which migrate to opposite electrodes and carry charge through the liquid. Students may choose free electrons by applying the conduction model of metals, but ionic compounds conduct through mobile ions rather than free electrons.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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