(A Level) Group 2: thermal stability and solubility explained

Learning objectives

Explain why Group 2 carbonates and nitrates become more thermally stable down the group, using the charge density of the cation and how strongly it polarises the large anion

Explain the trends in solubility of Group 2 hydroxides and sulfates from the way lattice energy and hydration enthalpy change down the group and hence the sign and size of ΔHsol

Predict the relative thermal stability or solubility of an unfamiliar Group 2 compound, such as a strontium or barium salt, from these explanations