Chem 1 Spring 2015

Mixtures Collections of multiple pure substances Mixtures can be separated by the use of physical properties If I have a mixture of sand and salt how could I separate the two from each other?

Mixtures Collections of multiple pure substances Mixtures can be separated by the use of physical properties If I have a mixture of sand and salt how could I separate the two from each other?

Two Types of Mixtures Heterogeneous Homogeneous

Heterogeneous Mixture The root hetero means “different”. A heterogeneous mixture is a mixture with different compositions throughout the sample of matter. Examples: Orange juice, granite

Homogeneous Mixtures The root homo means “same”. A homogeneous mixture is one that has the same composition throughout the mixture. The common name for a homogeneous mixture is a solution.

Solutions What do you think of when you hear the term solution?

Solutions What do you think of when you hear the term solution? Solutions are not only made using water They can be made using any liquid Octane Alcohol Oil

Solutions True or False Solutions must contain a liquid.

Solutions True or False Solutions must contain a liquid. FALSE Solutions can be solid, liquid, or gas

Solutions True or False Solutions must contain a liquid. FALSE Solutions can be solid, liquid, or gas Solid solutions are called alloys Examples: Steel, Brass, Bronze

Solutions True or False Solutions must contain a liquid. FALSE Solutions can be solid, liquid, or gas Solid solutions are called alloys Examples: Steel, Brass, Bronze Gas solutions are consistent mixtures of different gases: The air we breathe is actually a solution

Parts of a Solution Solute – the substance being dissolved Solvent – the substance that the solute dissolves in Aqueous Solution – this is a solution in which the solvent is water

Saturated Solutions Saturated – no more solute can be dissolved Unsaturated – more solute can still dissolve Super-saturated – more solute has dissolved than should be possible at a certain temperature