1. CHEMISTRY UNIT

2. Sunday, November 20, 2016 2 CHEMISTRY UNIT chemistry: the study of matter & the changes that matter undergoes. matter: anything that has mass & takes up space (i.e. has volume)

3. Matter Mixtures Solutions (_______________) Made up of a: 1. solute: _____________ 2. solvent: ______________ ex. ___________________ Pure Substances (____________) Made up of ______________ Compounds Elements Made up of _____ ______________ ex.____________ Made up of _____ ______________ ex.____________ Made up of ______________ _________________ Mechanical Mixtures (____________) ex. Homogeneous: ________________________Heterogeneous: _____________________ 2 or more different types of particles Heterogeneous Homogeneous ‘thing’ that dissolves liquid it dissolves in salad dressing salt water copper sulfate in water looks the same throughoutdifferent parts are visible 1 type of atom oxygen hydrogen water salt 2 or more different atoms only 1 type of particle 3

4. Sunday, November 20, 2016 CLASSIFICATION OF MATTER 1.Classify the diagrams as either: pure substances or mixtures elements or compounds 2.How many of molecules in each box? 3.How many atoms in each box? pure substance element no molecules 5 single atoms pure substance element 5 molecules 10 atoms pure substance compound 4 molecules 12 atoms mixture 3 molecules 6 atoms compounds element

5. 5 CLASSIFICATION OF MATTER pure substance compound 3 molecules 12 atoms compound elements mixture 3 molecules 7 atoms pure substance compound 2 molecules 10 atoms pure substance element 4 molecules 8 atoms Sunday, November 20, 2016

6. 6 CLASSIFICATION OF MATTER pure substance compound 3 molecules 6 atoms compound element mixture compounds 3 molecules 10 atoms mixture 2 molecules 5 atoms pure substance compound 2 molecules 4 atoms

7. Sunday, November 20, 20167 CLASSIFICATION OF MATTER pure substance compound 2 molecules 8 atoms elements compound mixture 3 molecules 7 atoms mixture 2 molecules & 1 atom 9 atoms compound element (single atom) pure substance element 8 atoms

8. Sunday, November 20, 20168 PHYSICAL vs. CHEMICAL PROPERTIES physical properties: properties we can describe with our senses Example: copper 1. state: (solid, liquid, or gas)__________ 2. colour: __________ 3. clarity: transparent/translucent/opaque__________ 4. lustre: (shiny or dull)__________ 5. texture: (smooth or rough)__________ 6. odour: (odourless, pungent, etc)__________ 7. malleability: (can be hammered into sheets)__________ 8. ductility: (can be drawn into a wire)__________ 9. solubility; soluble in water __________ 10. conductivity: can conduct electricity__________ 11. hardness: scale of 1(chalk) to 10 (diamonds)__________ solid copper (pinkish brown) opaque shiny smooth odourless/metallic malleable ductile insoluble conductive 7

9. Sunday, November 20, 20169 PHYSICAL vs. CHEMICAL PROPERTIES chemical properties: describe how elements & compounds react with one another during chemical changes ex. 1 – capacity to burn ex. 2 – ability to react with water ex. 3 – ability to react with acids ex. 4 – ability to react with oxygen

10. Sunday, November 20, 201610 PHYSICAL vs. CHEMICAL CHANGES 1)physical change: change in which the kind of matter stays the same no new substance is created changes are usually easy to reverse examples: a)changes of state (melting, freezing, condensation, sublimation) b) dissolving c) changes in appearance (grinding/cutting/etc)

11. Sunday, November 20, 201611 PHYSICAL vs. CHEMICAL CHANGES 2) chemical change: change in which new kinds of matter are produced examples: a) burning wood b) frying an egg c) metals reacting with acid

12. Sunday, November 20, 201612 PHYSICAL vs. CHEMICAL CHANGES Signs of a chemical change: a) new colour b) heat or light is given off c) gas, bubbles are formed d) precipitate is formed (i.e. solid forms from a liquid) e) change is not easy to reverse

13. Sunday, November 20, 201613 Physical (P) or Chemical(C) Changes? ____ breaking a mirror ____ ice cream dripping down a cone ____ lighting a match ____ drying clothes ____ baking a cake ____ car engine idling ____ grinding wheat into flour ____ adding milk to a cup of coffee ____ boiling water ____ fireworks ____ burning leaves ____ compacting garbage ____ making tea ____ adding salt to icy roads ____ sawing wood ____ milk curdling P C C P P C P P P P C P C P P C

14. Sunday, November 20, 201614 HOMEWORK Complete the ‘Physical vs. Chemical Properties’ Worksheet