A student is given the task to determine if an unknown compound contains ionic or covalent bonds. Which of the following groups of tests would be best able to answer that question?

1) Determine the electrical conduction in the liquid state, mass needed for a 0.1 M aqueous solution, and color of the solid.

2) Determine the solubility in water, electrical conduction in the liquid state, and melting point.

3) Determine the density, solubility in ethanol (C2H5OH), and electrical conduction in the solid state.

4) Determine the solubility in water, electrical conduction in the solid state, and color of the solid.

1 Answer
Andrea B.
Oct 22, 2017

2)

Explanation:

both ionic and covalent solids don't conduct elettricity, but ionic ones lead at liquid state and if their are solubilized in water. Not all of them, instead, solubilize in water as covalent or molecular solids. Some molecular solids (for example #I_2#, sugar) solubilize themselves in ethanol, while covalent and ionic solids generally doesn't. Melting point can be very different and doesn't depend by the tipe of bonds. Color of the solid, MM, and density have no importance

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