Objective: Distinguish b/t elements & compounds and physical changes & chemical changes.
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1 Do Now Date: Tuesday September 13, 2016 Objective: Distinguish b/t elements & compounds and physical changes & chemical changes. Copy & Complete: Elements are single atoms. Compounds are two or more elements chemically bonded together. List two elements and two compounds.
2 Tuesday September 13, 2016 Today: W-Up, Activity: Elements, Compounds, and Changes HW: Google Form (see Breslyn.org) Unit TEST next Week
3 Distillation of Water WaterCone
4 A few chemical changes Gummy Bear Molten Iron
5 Mf8k 4WdYbc
6 NB - Note Well During the activity I will be coming around to discuss what you are learning. Each member in the group is responsible for knowing and being able to explain the content. We will report out at the end of class.
7 Separating and Egg Yolk What is the physical property that allows this to work? OuTN_M
8
9 Do Now Date: Wednesday, September 14, 2016 Objective: Observe and describe chemical and physical changes. Define and give a three examples of a: Chemical Change Physical Change
10 Wed. September 14, 2016 Today: Lab: Physical and Chemical Changes HW: Finish lab Unit TEST next Week (Thurs of Fri)
11 Chemical or Physical Change? Is this a physical or chemical change? How can you support your answer? Photo from:
12 Chemical or Physical Change? Chemical changes result in the formation of a new compound.
13 Evidence of a Chem. Change Changes in heat and light. Color changes. Formation of a precipitate. Formation of a gas (sometimes bubbles). Remember: the change is difficult to reverse.
14 Chemical or Physical Change?. Sodium metal, Na(s), in H 2 O. Photo from: hrier/pyrophotography.html
15 Chemical or Physical Change? W Photo from:
16
17 Do Now Date: Thursday, September 15, 2016 Objective: Distinguish between physical changes and chemical changes. Copy & Complete: Physical changes do not result in the formation of a new substance. Chemical changes do. List two physical and two chemical changes.
18 Thursday, September 15, 2016 Today: W-Up, Collect Labs, Notes, Demos & Practice HW: Google Form (see Breslyn.org for link) Unit TEST next Wednesday
19 Chemical or Physical Change? W Photo from:
20 Chemical or Physical Change? W Photo from:
21 Chemical or Physical Change? W Bees making honey. Photo from:
22 Chemical or Physical Change? W Melting beeswax. Photo from:
23 Photo from: Chemical or Physical Change? W
24 Chemical or Physical Change? Table salt (NaCl) dissolving. Photo from:
25 Chemical or Physical Change? An image of a tobacco plant which has been genetically engineered to express a gene taken from fireflys (specifically: Photinus pyralis) which produces luciferase. Photo from:
26 Chemical or Physical Change? Photo from:
27 --
28 Heterogeneous and Homogenous Heterogeneous or homogenous mixtures? - salt water - trash can after lunch - soda - blood - ice cubes in water
29 Alloys Alloys are a mixture of two or more metals. The mixture has different properties than the individual metals. They could be stonger, conduct electricity better, absorb heat faster,.
30 Alloys Engines are made from alloys. Why? Photo from: 004/02/29/400%20Alloy%20Terminator %20on%20standweb.jpg
31 Chemists often need to separate mixtures. Why?
32 Friday Quiz I ll give you two separation techniques you used today and ask you to: 1. Explain how you would use the technique to separate a mixture. 2. Describe the physical properties involved. 3. Include a labeled diagram. You can use your notes from today.
33 During the demos: Be an active learner!!! Add to your notes. Ask or write down questions. Think of examples outside of the classroom.
34 Paper Chromatography W Photo from:
35 Liquid Chromatography (HPLC) W Photo from: chromatography.jpg
36 Liquid Chromatography (HPLC) Photo from: csweb.bournemouth.ac.uk/consci/ laboratory/hplc.htm
37 Demo: Magnetic Separation How can you separate the bits of iron in cereal?
38 Evaporation Photo from:
39 Filtration A micrograph of cellulose fibers in filter paper. Photo from: 154/tutorials/exp4A/crufilt/ A micrograph of glass fibers in sintered glass crucibles
40 Sublimation Photo from: ages/fg13_16.jpg
41 Exit Ticket Why is filtration better than evaporation to separate mud and water? Why is evaporation better to separate salt and water?
42 Friday Quiz I ll give you two separation techniques you used today and ask you to: 1. Explain how you would use the technique to separate a mixture. 2. Describe the physical properties involved. 3. Include a labeled diagram. You can use your notes from today.
43
44 Do Now Date: Friday, September 16, 2016 Objective: Plan the separation of a complex mixture. Complete: How would you separate a mixture of salt, sand, and water? What physical properties are involved?
45 Friday, September 16, 2016 Today: Warm-Up, Pre-Lab, Planning Separation of a Mixture Review notes, and book. Unit TEST next FRIDAY
46 Quiz 1. Explain how distillation can be used to separate a mixture of water (boiling point 100 C) and alcohol (78.3 C). Include a (labeled) diagram to support you answer. (10pts) 2. Is distillation based on a physical or chemical property? Briefly explain. (2pts) 3. Label each as a mixture or compound. Label mixtures as homogenous or heterogeneous. (5pts) a. ink b. water c. CuSO 4 d. a jar of sand with marbles at the bottom e. steel (an alloy of iron and carbon)
47 Elements & Compounds Elements - single atoms for example Fe, Cl, Mg,. Compounds combination of elements H 2 O, NaCl, H 2 SO 4
48 Elements & Compounds KI HCl Ce U Compound Compound Element Element MnO 2 Compound
49 Pure Substances Pure substances: have a constant composition cannot be separated or broken down by ordinary physical means. Is water a pure substance?
50 Mixtures A combination of two or more different substances. Can be separated by physical means.
51 Mixtures and Compounds What is the difference between a mixture and a compound? Salt Compound (NaCl) Distilled (Pure) Water Compound (H 2 O) Gatorade Salt Water Mixture (H 2 O, electrolytes, sugar, ) Mixture (NaCl and H 2 O)
52 Homogenous Mixture Same composition throughout. Particles equally distributed. Example: salt dissolved in water. Also called a solution.
53 Heterogeneous Mixture Varying composition in sample. Example: a salad.
54 Contents of Mixture Salt Sand Paper Gravel Iron Filings Styrofoam
55 Lab Assignment Info Draft Due: Next Tuesday Final Type Written Report: Friday Remember: This is a full lab report. Your procedure must be detailed. Your conclusion must address the physical properties involved in the separation.
56
57 Additional Content
58 Do Now Date: September 12, 2014 Objective: Plan the separation of a complex mixture. Complete: How would you separate a mixture of salt, sand, and water? What physical properties are involved?
59 Do Now Date: Thursday, September 16, 2015 Objective: Observe demonstrations and plan how to separate a complex mixture. Define and give an example: Mixture Heterogeneous Homogenous
60 Friday, September 12, 2014 Today: Lab: Separating a Mixture
61 Metalloids Boron Silicon Germanium Arsenic Antimony Tellurium Polonium
62 Metallic Character From
63 Non-metals 1 - Hydrogen 2 - Helium 6 - Carbon 7 - Nitrogen 8 - Oxygen 9 - Fluorine 10 - Neon 15 - Phosphorus 16 - Sulfur 17 - Chlorine 18 - Argon 4 - Selenium 35 - Bromine 36 - Krypton 3 - Iodine 54 - Xenon 5 - Astatine 86 - Radon
64 Lab: Chromatography On the top of your filter paper (the stationary phase) write your name, date, and period. Fill a beaker with 1-2 cm of water. This is your mobile phase. Follow instructions on how to proceed.
65 Significant Figures Practice x
66 Tyndall Effect Tyndall Effect colloids and suspensions scatter light in all directions.
67 Tyndall Effect Image from tyndall/
68 Tyndall Effect This effect is also seen when headlights shine into a fog and when sunlight shines through clouds.
69 Demo Mg(s) + HCl(aq) MgCl 2 (aq) + H 2 (g) Is this a physical or chemical change? How can you support your answer? Does the equation above obey the law of conservation of matter?
70 Na(s) in H 2 O(l) ctable/stories/011.2/videos/sodiumr esearch02.html
71 Demo Fe(s) + O 2 (g) Fe 3 O 2 (s) Is this a physical or chemical change? How can you support your answer? Does the equation above obey the law of conservation of matter?
Objective: Complete separation of complex mixture and record observations.
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