Why salt doesn't conduct electricity as a solid but does when melted
In short: This video breaks down the fundamental chemistry of ionic compounds, explaining how electron transfer creates stable structures and why these substances behave differently depending on their physical state.
The video explains that ionic bonds form when metals transfer electrons to non-metals, creating a giant ionic lattice held together by strong electrostatic forces. Because these bonds require significant energy to break, ionic compounds typically possess high melting and boiling points.
To determine chemical formulas, you must balance the charges of positive and negative ions—including common polyatomic ions like hydroxide, sulphate, nitrate, carbonate, and ammonium—to ensure the final compound is neutral. A key distinction highlighted is electrical conductivity: while ions are fixed in a solid lattice, they become free to move when molten or dissolved, allowing for electricity to flow.
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Sources
- Summary by Intellect · source: GCSE Chemistry - Ionic Compounds - Structure | Properties | Formula (2027/28 exams)
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