Journal #1 Explain the difference between the control and experimental group #2 Explain the difference between the independent variable and the dependent.

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Presentation transcript:

Journal #1 Explain the difference between the control and experimental group #2 Explain the difference between the independent variable and the dependent variable

Set Up: Chromatography Lab Separating Mixtures

Chapter 2 Matter and Change

2.1 Matter Anything that has mass and takes up space Mass: amount of matter an object contains. Journal: What is the difference between mass and weight????

Physical property: quality or condition of a substance that can be measured or observed. Examples: color, solubility….. Journal: List examples of physical properties.

Sates of Matter Physical Changes (NOT Chemical Changes!!!!) Why are they not Chemical changes???? Think about water ( ice, drinking water, water vapor)

Properties of the three primary states of matter SOLIDLIQUIDGAS SHAPEDefiniteIndefinite: takes shape of container Indefinite VOLUMEDefinite Indefinite

Physical Change Alters material with out changing composition. Journal : What are examples of physical changes??

Mixture A physical blend of two or more substances – Heterogeneous: not uniform – Homogenous: same through out Homogenous mixtures are also called solutions May be solid, liquid, or gas Journal : Give an example of each type of mixture.

How can we separate mixtures? Simple Physical Methods: cheese cloth, colander, fork Distillation - How many students have heard of distilled water? – What does the term distillation mean to you? Chromatography

Distillation Liquid is boiled to produce a vapor Vapor rises As it rises, it cools and condenses in a chamber This chamber allows the condensed liquid to drop into a separate container.

Chromatography Passing a mixture through a stationary phase so that particles separate – The separation is based on size and polarity of the molecules (charge) -Can be used to separate Dyes, proteins

Paper Chromatography Place a dot or small line of solution to be separated across the bottom of the chromatography paper. Paper is placed in a jar with a shallow layer of solvent ( a dissolving solution) As the solvent rises to the top of the paper, the mixture is separated based on size and polarity.