Measuring Solubility (HSC SSCE Chemistry): Quizzes

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Measuring Solubility
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What does solubility describe?

Max grams dissolving in 100g solvent at temp

What equilibrium state exists in a saturated solution?

Rate of dissolution equals crystallization

How is a supersaturated solution created?

Heat saturated solution, then cool carefully

What happens when a supersaturated solution is bumped or a crystal is added?

Excess solute rapidly precipitates out

For most salts, how does solubility change with increasing temperature?

Solubility increases

What is retrograde solubility?

Solubility decreases with rising temp

For K2Cr2O7\text{K}_2\text{Cr}_2\text{O}_7, how much extra dissolves when heated from 20°C to 80°C?

46 g46\text{ g} per 100 g100\text{ g} water

If 3.00 g3.00\text{ g} KCl dissolves in 10.00 g10.00\text{ g} water, what is the solubility per 100g water?

30.0 g/100g30.0\text{ g}/100\text{g} water

Which statement describes an unsaturated solution?

Can still dissolve more solute at this temp

What is the recrystallization temperature in the solubility experiment?

Temp when crystals first appear on cooling

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