Solubility of Solids & Temperature

solubility of solids and temperature

-solubility of most substances increase with increasing temperature (exceptions are some ionic compounds: SO32-, SO42-, AsO43-)

-you can use the concept of equilibrium to predict the solubility of a solute based on enthalpy of solution

ΔHsol

-if ΔHsol < 0 (exothermic), then increasing the temperature decreases solubility (solute + solvent ⇌ solution and heat

-if ΔHsol > 0 (endothermic), then increasing the temperature increases solubility (solute + solvent + heat ⇌ solution

how can you identify the type of solution from a plot given the temperature and solubility

-the line plotted on the graph of the solubility vs temperature represents the concentrations of a saturated solution at a given temperature

-if you are below the line at a certain temperature, the solution is unsaturated

-if you go above the line at a certain temperature, the solution is supersaturated

extra

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