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Solubility: Factors Affecting Dissolving Rate. Dissolvable solids in liquids (water). Temperature. Speeds up how fast the solute dissolves because increased temperature means faster moving molecules and more room for the solute. Surface Area.
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Solubility: Factors Affecting Dissolving Rate Dissolvable solids in liquids (water).
Temperature • Speeds up how fast the solute dissolves because increased temperature means faster moving molecules and more room for the solute.
Surface Area • Smaller particles have more surface area for the solvent to touch.
Agitation (Stirring) • Speeds up how fast the solvent touches the solute. • Moves the solute into unsaturated regions ofthe solvent.
Solubility of Gases in Liquids Solubility decreases with increasing temperature. Solubility increases with increasing temperature.
Temperature • Increasing temperature increases molecular speeds. Gas molecules have greater probability to leave the solution. Compared to solid solutes, the solubility curves are decreasing with increasing temperature.
Pressure Increasing pressure forces more gas into solution.
Liquids in Liquids • “Like dissolves like.” • Yesterday’s lab • Polar dissolves polar (water & washable marker) • Nonpolar dissolves nonpolar (paint thinner & crayon)