Q4. A student was investigating a magnesium salt, X. The student found that X:
has a high melting point
does not conduct electricity
dissolves in water and the solution conducts electricity.
What is the type of bonding in magnesium salt X? (1)
Explain why solid X does not conduct electricity but a solution of X does conduct
electricity. (2)
(a)
(b)
(i)
(ii)
The student dissolved X in water. The student added dilute nitric acid and silver nitrate
solution to the solution of X. A white precipitate was formed. Salt X contains chloride
ions Fyplain why a white precipitate was formed (2)