6.5: Solubility

These flashcards cover key concepts related to solubility factors and the mechanisms of dissolving.

Surface Area of Solute

• the bigger the SA of a solute (powder vs crystal), the faster it dissolves due to more contact points with the solvent.

Agitation

• stirring/shaking increases rate of dissolving by bringing fresh solvent into contact with the solute surface

Temperature and Solubility

• solid / liquid solubility increases with temperature

• gas solubility decreases with increased temperatures

ΔHsol (Heat of Solution)

• heat absorbed (+) or released (-) when a solute dissolves

Pressure and Gas Solubility

• increased pressure greatly increases solubility of gases in liquids

• higher pressure forces more gas into the liquid phase

Like Dissolves Like

• polar solvents dissolve polar and ionic solutes

• nonpolar solvents dissolve nonpolar solutes

Solvation

• process where solvent molecules surround individual solute particles

• aid in the dissolution of the solute.

Exothermic

• releases heat

Endothermic

• absorbs heat

Solubility & Dissolving Rate Factors

• surface area of solute

• agitation

• temperature

• pressure