4.19 Using solubility guidelines, predict whether each of the following compounds is soluble or insoluble in water: (a) NiCl 2 SOLUBLE most chlorides are soluble (b) Ag 2S INSOLUBLE most sulfides not soluble (c) Cs 3PO 4 SOLUBLE while most phosphates are not soluble, Grp IA Cs+ is (d) SrCO 3 INSOLUBLE most carbonates not soluble (e) PbSO C Calcium reacts more vigorously with water. D The sum of the first two ionisation energies of calcium is greater. Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against the statements that you consider to be correct).
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