Electrochemistry Result Question 50
50. Give reasons in one or two sentences.
“Anhydrous $\mathrm{HCl}$ is a bad conductor of electricity but aqueous $\mathrm{HCl}$ is a good conductor.”
(1985, 1M)
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Solution:
- For conductivity, the charge carriers are required. In anhydrous state, $\mathrm{HCl}$ is not ionised and no charge carrier ions are available, hence bad conductor. However, in aqueous solution, $\mathrm{HCl}$ is fully ionised producing $\mathrm{H}^{+}$ and $\mathrm{Cl}^-$ and conducts electricity.
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