Question

When Mgcl2.6H20 is heated it forms :
a) magnesium chloride or
b)magnesium oxychloride ?

Answer 1

Magnesium chloride the will form.
Mgcl2.6H20-mgcl2+h2o

Answer 2

MgCl2.6H2O undergoes partial hydrolysis by its own water molecules of crystallisation when heated. MgCl2.6H2O upon heating gives MgCl2.2H2O and then Mg(OH)Cl or MgOCl + HCl which upon strong heating gives MgO.