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Bell Work

Bell Work. According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres? . Ch. 1 - Matter. II. Classification of Matter (p.15-17, 397-398) Matter Flowchart Pure Substances Mixtures. MIXTURE. PURE SUBSTANCE. yes. no. yes. no.

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Bell Work

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  1. Bell Work According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres? C. Johannesson

  2. Ch. 1 - Matter II. Classification of Matter (p.15-17, 397-398) Matter Flowchart Pure Substances Mixtures C. Johannesson

  3. MIXTURE PURE SUBSTANCE yes no yes no Is the composition uniform? Can it be chemically decomposed? Colloids Suspensions A. Matter Flowchart MATTER yes no Can it be physically separated? Homogeneous Mixture (solution) Heterogeneous Mixture Compound Element C. Johannesson

  4. Matter • Matter is everywhere. • Matter is anything that takes up space and has mass. • Matter is constantly experiencing both chemical and physical changes.

  5. A. Matter Flowchart • Examples: • graphite • pepper • sugar (sucrose) • paint • soda element hetero. mixture compound hetero. mixture solution C. Johannesson

  6. B. Pure Substances • Element • composed of identical atoms • EX: copper wire, aluminum foil C. Johannesson

  7. B. Pure Substances • Compound • composed of 2 or more elements in a fixed ratio • properties differ from those of individual elements • EX: table salt (NaCl) C. Johannesson

  8. B. Pure Substances • Law of Definite Composition • A given compound always contains the same, fixed ratio of elements. • Law of Multiple Proportions • Elements can combine in different ratios to form different compounds. C. Johannesson

  9. B. Pure Substances • For example… Two different compounds, each has a definite composition. C. Johannesson

  10. C. Mixtures • Variable combination of 2 or more pure substances. Heterogeneous Homogeneous C. Johannesson

  11. Tyndall Effect C. Mixtures • Solution • homogeneous • very small particles • no Tyndall effect • particles don’t settle • EX: rubbing alcohol C. Johannesson

  12. C. Mixtures • Colloid • heterogeneous • medium-sized particles • Tyndall effect • particles don’t settle • EX: milk C. Johannesson

  13. C. Mixtures • Suspension • heterogeneous • large particles • Tyndall effect • particles settle • EX: fresh-squeezed lemonade C. Johannesson

  14. C. Mixtures • Examples: • mayonnaise • muddy water • fog • saltwater • Italian salad dressing colloid suspension colloid solution suspension C. Johannesson

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