Question

A given substance is a white, granular solid at 25 °C that does not conduct electricity. It melts at 750 °C wand the melt conducts electricity. It dissolves easily in water and produces a conductive solution. Identify the type of crystal and justify your answer.

Answer 1

Ionic crystal

Step-by-step explanation:

An ionic crystal has a high melting point. In an ionic crystal, the ions are tightly held in electrostatic attraction by their oppositely charged neighbors forming a rigid three dimensional lattice. However, when this solid melts, the rigid crystal structure collapses and the individual ions become free and mobile. Hence the melt conducts electricity.