27.1 Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds · Vary the cation and the anion's size to see why sulfates get less soluble down the group, hydroxides more soluble, and carbonates more stable.
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Vary the cation and the anion's size to see why sulfates get less soluble down the group, hydroxides more soluble, and carbonates more stable.
You will be able to
Explain the trend in solubility of the Group 2 hydroxides and sulfates using the enthalpy change of hydration and the lattice energy.
Explain how ionic radius and charge density affect the polarisation of a large anion and the thermal stability of carbonates and nitrates.
Deduce whether ΔHsol becomes more or less exothermic from the changes in lattice energy and hydration enthalpy.
