3.1 Predict the solubility of a given compound using solubility rules

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The prompt presents a learning objective about predicting solubility using solubility rules and lists two items as potential components to identify and apply. 
Option 3.1.1: 'Identify and apply the rules for compounds that are usually soluble.' This is a valid and essential part of predicting solubility, because many solubility rules revolve around identifying species that tend to dissolve in water (for example, salts of alkali metals and ammonium typically being soluble). Applying these rules helps determine when a compound is expected to be soluble. 
Option 3.1.2: 'Identify and apply the rules for compounds that are usually insoluble.' This is equally important, since other solubility rules specify when compounds are typically insoluble (such as many carbonates, phosphates, sulfides, and hydroxides, with common exceptions). Recognizing these insolubility patterns is necessary to predict what will not dissolve in water. 
Consider how these two options function together: a comprehensive solubility prediction requires both recognizing soluble patterns and recognizing insoluble patterns, as well as understanding any exceptions. 
Note on the provided data: the answer_options field is empty, so there are no alternative phrasing or distractors given to analyze against. In a typical exam context, you would compare multiple statements to determine which accurately reflect the scope of solubility rules. Given what’s available, both 3.1.1 and 3.1.2 describe correct, complementary aspects of the skill of predicting solubility using standard rules, and neither is inherently incorrect. 
When applying these in practice, you would also consider common exceptions (such as nitrates being soluble in nearly all cases, or sulfates being insoluble except with certain cations) to refine predictions and avoid overgeneralization.

MCD1170 - T1 - 2025 Learning Pathway for Week 3

3.1 Predict the solubility of a given compound using solubility rules

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