Classifying Matter. Matter: Anything that has mass and volume Organizing the Knowledge of Substances.

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Presentation transcript:

Classifying Matter

Matter: Anything that has mass and volume Organizing the Knowledge of Substances

Homogeneous Mixture: Solutions Solute: A substance that is dissolved in something Solvent: Any substance that dissolves a solute Solution: Homogeneous mixture of dissolved substances containing at least one solvent and one solute Eg. Salt water Water is a solvent Salt is a solute

Elements versus Compounds SubstanceEmpirical Definition Theoretical Definition Examples ElementsCan’t be broken down further Made of one kind of atom K Mg O2 CompoundDecomposed chemically by heat or electricity Made of more than one kind of atom H2O NaCl

Solutions compared to Elements and Compounds The Relationship between Solutions, Elements, and Compounds : -Solutions contain more then one compound or element. These compounds and elements are uniformly dispersed throughout the solution. Eg. HCl + H20  HCl (compound) (Compound) (solution) - Pure substances can be written as chemical formulas

Empirical Classification System - Separating and grouping matter

Empirical Classification System - Based on methods of separation of matter Methods of separation:

Empirical Classification System - Based on methods of separation of matter Methods of separation: Homogeneous and Heterogeneous mixtures: Can be separated by physical means (Extraction, Filtration, Chromatography etc) Pure Substances : - Compounds: Can only be separated by chemical change not physical change - Elements: Cannot be broken down further

Empirical Classification System - Based on methods of separation of matter Methods of separation: Homogeneous and Heterogeneous mixtures: Can be separated by physical means (Extraction, Filtration, Chromatography etc) Pure Substances : - Compounds: Can only be separated by chemical change not physical change - Elements: Cannot be broken down further Chemical Decomposition: Breaking down a compound into its elements

Theory and Empirical Classification Theories relating to the empirical classification systems. -Elements are composed of one kind of atom -Atoms are the smallest particle of an element - Elements and compounds both make up molecules.