International General Certificate of Secondary Education (IGCSE) Chemistry Practice Exam

The solubility rule for nitrate salts indicates that all nitrates are soluble in water. This means that when nitrates are dissolved in water, they do not form precipitates and are instead completely dissociated into their constituent ions. This characteristic is vital in both qualitative and quantitative analysis in chemistry, as it allows for the prediction of behavior in chemical reactions and the understanding of ion interactions in solution.

This rule applies universally to all nitrate compounds, regardless of the cation they are paired with, which sets them apart from many other types of salts that may have varying solubility depending on their composition. Understanding this rule is particularly useful in various laboratory practices where reactions involving nitrate salts are common.