Chemical Reactions Outcomes – 6th Outcomes: 14) Describe familiar chemical reactions, and represent these reactions by using word equations and chemical formulas and by constructing models of reactants and products - describe combustion reactions, such as: carbon + oxygen → carbon dioxide [C(s) + O2(g) → CO2(g)]; - describe corrosion reactions, such as: iron + oxygen → iron(II) oxide [Fe(s) + O2(g) → FeO(s)]; - describe replacement reactions, such as the following: zinc + copper(II) sulfate → zinc sulfate + copper [Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)] 15) Identify and evaluate dangers of caustic materials and potentially explosive reactions • observe and describe evidence of chemical change in reactions between familiar materials, by: − describing combustion, corrosion and other reactions involving oxygen − observing and inferring evidence of chemical reactions between familiar household materials • distinguish between materials that react readily and those that do not (e.g., compare reactions of different metals to a dilute corrosive solution) 16) Observe and describe patterns of chemical change, by: − observing heat generated or absorbed in chemical reactions, and identifying examples of exothermic and endothermic reactions − identifying conditions that affect rates of reactions (e.g., investigate and describe how factors such as heat, concentration, surface area and electrical energy can affect a chemical reaction) − identifying evidence for conservation of mass in chemical reactions, and demonstrating and describing techniques by which that evidence is gathered. (Already done in Mass and Chemical Change Lab) What are the most important chemical reactions that occur on our planet every day??? Learning Activities *Any definitions must be in your own words and have 2 examples – Use Frayer Model for tough ones. Definitions: chemical reaction, reactant, product, endothermic reaction, exothermic reaction, reaction rate, catalyst, enzyme, inhibitor, corrosion, combustion, cellular respiration, photosynthesis, galvanization Textbook – Reference throughout unit!!! - Appendix B – Periodic Table – Page 440 441 - Appendix C – Properties of Common Substances – Page 442 – 445 - Textbook – Pages 146 - 164 1) Observe burning of magnesium and use this reaction to learn about chemical equations, reactants, products. You will be taking some notes – observations and new learnings. (Teacher lecture) 2) You will observe a few chemical reactions to help you understand the different types and categories. Use table below to record your observations. Magnesium Burning: Reaction Formation (Burning of Magnesium/Rusting) Decomposition (Electrolysis of Water) Replacement (Magnesium and Hydrochloric Acid) Combustion (Exothermic) Reactants Products Evidence of Change Corrosion Cellular Respiration Photosynthesis (Endothermic) Assessment Page 152 – Answer questions 1-4 – Hand in for assessment.