Mixtures …matter that contains two or more substances that differ in physical and chemical properties.

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Presentation transcript:

Mixtures …matter that contains two or more substances that differ in physical and chemical properties.

Pure substances are: Substance that has definite chemical and physical properties. Some examples Gold (Au), oxygen (O), iron (Fe), sulfur (S) Water (H2O), salt (NaCl), hydrogen peroxide (H2O2)

Two types of mixtures: Heterogeneous: -not well mixed, easy to separate. Ex. a salad Homogeneous: -well mixed, hard to separate. Ex. blood

Aqueous Solutions: Solutions that are solids dissolved in water. Two parts of a solution: Solute – substance being dissolved. Solvent – substance doing the dissolving.

Some aqueous solutions can conduct electricity – Electrolytes. Some do not – Nonelectrolytes.