For the pair $\mathrm{NaCl}$ and $\mathrm{KBr}$, state with reasons, which one you would expect to have the higher lattice energy.

For the pair $\mathrm{KCl}$ and $\mathrm{SrS}$, state with reasons, which one you would expect to have the higher lattice energy.

In some crystal lattices, some of the ions are polarised. State the meaning of the term ion polarisation.

In some crystal lattices, some of the ions are polarised. Explain why a magnesium ion is better than a sodium ion at polarising an iodide ion.

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Define the term enthalpy change of solution.

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Define the term enthalpy change of hydration.

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Write symbol equation that describe the enthalpy change of solution of sodium chloride.

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Write symbol equation that describe the enthalpy change of hydration of the chloride ion.