Solutions!

Classification of Matter Matter Pure Substanc es Mixtures HomogeneousMixturesHeterogeneousMixtures Elements Compounds

Heterogeneous Mixtures see visibly different regionssee visibly different regions –granite –dirt –cereals –oil & vinegar see a boundarysee a boundary –ice cubes in water

Homogeneous Mixtures particles very small – on atomic scaleparticles very small – on atomic scale –too small to be seen –can’t be sorted or trapped by filter –won’t scatter light particles evenly distributedparticles evenly distributed mixture will not separatemixture will not separate

Solution homogeneous mixture of 2 or more substances in a single physical state (phase)

Parts of a Solution solutesolute = substance being dissolved solventsolvent = dispersing medium substance being dissolved in

Can you identify the solute and solvent in each picture?

solute = ? solvent = ?

hints to identify solute & solvent solutesolute: –substance that changes phase –substance that have less of solvensolvent: –substance that maintains phase –substance that have more of

Aqueous Solutions waterwater is solvent transition metalstransition metals form brightly colored solutions

Solutions occur in all 3 phases! Alloys: Brass, etc. SolidSolid Fillings: Hg in Ag SolidLiquid H 2 in Pd metal SolidGas Salt water LiquidSolid Antifreeze in radiator LiquidLiquid Seltzer Water LiquidGas MothballsGasSolid Water Vapor in Air GasLiquid AirGasGas ExampleSolventSolute

Gas in a liquid: CO 2 in and out of water bubbles mean it ’ s a mixture not a solution!