'Scatter light' diaporamas de présentation

Chapter 17

Chapter 17. Composition of Matter. Objectives. Objective: Define substances and mixtures. Objective: Identify elements and compounds. Objective: Compare and contrast solutions, colloids, and suspensions. CLE 3202.1.5 Evaluate pure substance and mixtures. Chemistry.

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Solutions/Acid & Bases

Solutions/Acid & Bases. Chapter 15 & 19. Solution are homogenous mixtures. Solutions are made up of 2 things: A solute & a solvent. Water is the most common solvent in liquid solutions. Dissolves in a solvent Example: Sugar in water. Will not dissolve in a solvent Example:

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THE Single Particle Soot Photometer (SP2): METHODS, APPLICATIONS

THE Single Particle Soot Photometer (SP2): METHODS, APPLICATIONS. BENJAMIN SUMLIN GRADUATE SEMINAR IN ATMOSPHERIC SCIENCES 24 MARCH, 2014. Single Particle Soot Photometer. INTRODUCTION Black Carbon Why measure? Radiative Forcings Climate Models

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Classification of Matter

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Hansen Hall, B050 Purdue University Office: 494 0757 Fax 494 0517

BMS 631 - LECTURE 3 Light and Matter J.Paul Robinson The SVM Professor of Cytomics School of Veterinary Medicine & Professor of Biomedical Engineering College of Engineering Purdue University. Hansen Hall, B050 Purdue University Office: 494 0757 Fax 494 0517

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Classifying matter

Classifying matter. Ch. 2. Pure Substances. - matter that always has the same composition Every sample of the substances always has to same properties Uniform composition, fixed properties. Elements. Cannot be broken down into simple substances

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Mixtures: Homogenous and Heterogeneous

Mixtures: Homogenous and Heterogeneous. 1. Two or more substances that are not chemically combined, can be separated by physical means. 2. The simplest pure substance, found on the periodic table 3. Two or more elements combine, can be separated by chemical means.

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Mixtures

Mixtures. Matter. Substances. Mixtures. Elements. Compounds. Heterogeneous Mixtures. Homogeneous Mixtures. Mixtures ? Substances separated by physical methods Compounds ? Substances separated by chemical methods. Mixtures. Combo of 2 or more pure substances

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ELEMENTS, COMPOUNDS, & MIXTURES

ELEMENTS, COMPOUNDS, & MIXTURES. How can you determine whether something is an element or not? They are all listed on the periodic table. ELEMENT SONG. ELEMENTS. Pure substance Made of only 1 type of particle Ex: copper wire only has copper atoms

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WDYT? Is it easier to separate milk from coffee or milk from a bowl of cereal? Why?

Chapter 2 Activity 3 Page 120 Solutions, Suspensions, and Colloids. WDYT? Is it easier to separate milk from coffee or milk from a bowl of cereal? Why?. Investigation. Investigate You have 30 minutes to complete the activity

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Classifying Mixtures

Classifying Mixtures. Mixtures. Can be classified by how well the parts of the mixture are mixed Can be separated by physical means like filtration or distillation. Heterogeneous Mixtures. Not evenly mixed Can easily see the different parts. Homogenous Mixtures. Evenly mixed

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Colloids

Colloids. Solutions. Have small particles (ions or molecules) Are transparent Do not separate Cannot be filtered Do not scatter light. Colloids. Have medium size particles Cannot be filtered Separated with semipermeable membranes Scatter light (Tyndall effect). Colloids.

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Mixtures

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Mixtures

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Suspensions and Colloids

Suspensions and Colloids. Colloids and suspensions are heterogeneous mixtures. Suspensions and Colloids. Suspensions and colloids are NOT solutions. Suspensions : The particles are so large that they settle out of the solvent if not constantly stirred.

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