1. (a) (i) Covalent bond
(ii) Ionic bond
(b) (i) Molecules
(ii) Ions
(c) Compound X consists of molecules with no free ions or delocalized electrons in either solid or molten state, so it cannot conduct electricity.
(d) In solid state, the ions in compound Y are held in fixed positions within a lattice and cannot move to carry electric current.
(e) In molten state, the ions in compound Y are free to move and can carry electric current.
(f) Compound X: Molecules; Compound Y: Ions
(g) Compound Y is ionic and water is a polar solvent; the polar water molecules can surround and separate the ions, allowing dissolution.
(h) Organic solvents are typically non-polar and cannot effectively solvate the charged ions in compound Y.
(i) Compound X is non-polar (or has low polarity), so it dissolves in non-polar organic solvents due to similar intermolecular forces.
2. D. Insoluble in water
Parent Tip: Review the logic above to help your child master the concept of properties of ionic compounds worksheet.
