Measuring Solubility (HSC SSCE Chemistry): Flashcards

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Measuring Solubility
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Solubility

Max mass (g) in 100 g100\text{ g} solvent at specific temp

Saturated solution

Max solute dissolved at that temperature

Unsaturated solution

Can dissolve more solute at current temp

Supersaturated solution

More solute than saturated at same temp

Effect of disturbing supersaturated solution

Excess solute rapidly precipitates out

Solubility trend with temp (most salts)

Increases as temperature rises

Retrograde solubility

Solubility decreases with increasing temp

Example of retrograde solubility

Cerium sulfate (Ce2(SO4)3\text{Ce}_2(\text{SO}_4)_3)

Reading solubility curve method

Vertical from temp, horizontal to y-axis

Solubility curve axes

x-axis: temperature (°C), y-axis: solubility (g/100 g100\text{ g})

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