The aqueous solution of sugar does not conduct electricity. However, when sodium chloride is added to water, it conducts electricity. How will you explain this statement on the basis of ionisation, and how is it affected by the concentration of sodium chloride?

Answers (1)

The conductance of any substance depends on the ions present in the solution since sodium chloride (NaCl) is an ionic compound which ionises completely in solution (NaCl has a dissociation rate of 100% i.e. it ionizes completely in water) forming an aqueous solution and hence the solution conducts electricity. Sodium Chloride ionizes into sodium ion (Na+) and chloride ion (Cl-) in water, which conducts electricity.

Hence, higher would be the number of ions of Socium Chloride in the water, higher would be the conductivity.

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