100 likes | 284 Views
SOLUTION FORMATION. Two parts to a solution (soln): solute – dissolving particle solvent – dissolving medium miscible – liquids dissolve in one another immiscible – liquids that are insoluble in one another. SOLUTION FORMATION. How fast will a soluble substance dissolve? depends on:
E N D
SOLUTION FORMATION Two parts to a solution (soln): solute – dissolving particle solvent – dissolving medium miscible – liquids dissolve in one another immiscible – liquids that are insoluble in one another
SOLUTION FORMATION How fast will a soluble substance dissolve? depends on: Agitation Temperature Particle Size
AGITATION • solute dissolves more rapidly • brings fresh solvent in contact with surface of solute • affects RATE of dissolving, NOT AMOUNT of solute that dissolves
TEMPERATURE • kinetic E of solvent is higher at higher temperature • increased FREQUENCY and FORCE of collisions of water molecules with surface of crystal
PARTICLE SIZE • powder dissolves more rapidly than a crystal • greater surface area in powder – more exposed to colliding water molecules
SOLVATION • interaction between dissolving particles and solvent • ex: NaCl in H2O
SATURATED SOLUTION contains maximum amount of solute for a given amount of solvent at constant pressure dynamic equilibrium exists betw. solvation and de-solvation
UNSATURATED SOLUTION • contains less solute than the maximum amount
MOLARITY • defines concentration • amount of solute dissolved in a given quantity of solvent • Molarity (M) = moles solute Liters of solution