Question

how is magnesium chloride formed by transfer of electrons?why does the solution of magnesium chloride conduct electricity.

Answer 1

magnesium chloride a ionic compound is formed by the transferring of electrons.
magnesium having 2 valence electron and chlorine having 1 valence electron are interchanged with each other so the resultant compound is the MgCl2.

also in order of being an ionic compound and the due the presence of free electrons it conducts electricity

Answer 2

Formation of Magnesium chloride:

In order to achieve a complete octate, magnesium has to lose its two valence electrons similarly, for chlorine to achieve its octate, it has to gain one electron, which is why magnesium combines with chlorine by donating its two valence electrons and forms an ionic bond. Chlorine receives these two valence electrons and forms one magnesium and 2 chloride ions

Mg + Cl-- MgCL2

Conduction of electricity:

Magnesium chloride only conducts electricity when in molten or liquid state. It is an ionic compound and in liquid state it releases its ions when enables them to conduct electricity.