Introduction to Solubility Equilibria
A slightly soluble salt reaches a dissolution equilibrium: the undissolved solid is in dynamic equilibrium with its dissolved ions, described by the solubility product, Ksp. The Ksp expression is the product of the ion concentrations, each raised to its coefficient (the solid is excluded).
The traps here are that adding more solid dissolves more (a saturated solution holds a fixed ion concentration; extra solid just sits there), reading solubility straight off Ksp (it must be derived through the equilibrium), and treating dissolution as a hard stop (it is a dynamic equilibrium).
The work
3 ways in · any order
Lesson
Solubility Equilibria
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A slightly soluble salt is in dynamic equilibrium with its ions via Ksp; solubility is derived, not read off. The lesson sets up Ksp and derives solubility, then closes with a ten-scenario check.
Diagnostic
10-item topic check
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Ten items spanning the Topic 7.11 misconceptions: more solid thought to give more dissolved ions, solubility read straight from Ksp, and dissolution taken as a hard stop rather than a dynamic equilibrium.
Targeted Practice
Drill a single misconception
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Pick one of the failure modes you missed and drill it on its own. The round is adaptive: two correct in a row clears the misconception and moves you to the next.