Chemistry 12 Curriculum Review April Gordon, Scott Milton, and Joey Williams The Atlantic Canada Science Curriculum Chemistry 11 and Chemistry 12 covers the program design and components, the curriculum outcomes framework, the chemistry 11 outcomes, and the chemistry 12 outcomes. This document will focus on the chemistry 12 outcomes. The curriculum document discusses the three processes of scientific literacy, how to meet the learner’s needs, and assessment and evaluation in science classes. Each unit in the document is broken down into the four general curriculum outcomes: STSE, skills, knowledge, and attitudes. Chemistry 12 is composed of four units: thermochemistry; solutions, kinetics, and equilibrium; acids and bases; and electrochemistry. Order in which units should be taught: 1. Thermochemistry 2. Solutions, kinetics, and equilibrium 3. Acids and Bases 4. Electrochemistry Unit Details: Thermochemistry Description Kinetics, Equilibrium and Solutions Students are Students are expected to expected to have understand how an understanding energy is involved of the rate of in various systems. chemical Students will reactions which develop their can be described planning, using equations, recording, calculations, analyzing, and concentrations energy change and experiments. evaluation skills. Students will be Students should expected to evaluate how fuels collect and provide energy for arrange solution industry, from data, using foods, and other specific formats sources. This unit and data should help treatment. students develop Calculating an interest in global molarities of energy issues and solutions and possible solutions. molar solubility Lab work and will be expected. calculations for Knowledge of the Acids and Bases Electrochemistry This unit builds upon the basic skills acquired in previous years and elaborates on the solutions unit. Students will learn varying definitions of acids and bases up to the Brønsted-Lowry understanding. WHMIS and nomenclature will be used to promote safe chemical handling, storage, and disposal. Problem solving and laboratory work are the suggested means of teaching Students are expected to understand that energy is involved in electrochemical changes. This will be achieved by applying theories of electrical forces, matter, and energy in chemical changes. In this unit, students will learn to calculate quantitative relationships in these chemical changes. By strengthening their skills in problem solving and decision making, an interest for the application of technology will be solidify their understanding of energy changes. terms exothermic, endothermic, enthalpy, activation energy, activated complex, reactants and products will be expected. Specific Curriculum Outcomes -Thermochemisty STSE -Experiments with Energy Changes -Thermochemistry and Potential Energy -Bonding and Hess’ Law -Science Decisions Involving Thermochemistry Materials - Hot pack/Cold pack - Styrofoam cup calorimeter - Thermometers - NH4Cl - NaOH - Powdered iron, NaCl, H2O, and vermiculite - Propanol - Glow sticks -Concentration, Properties, and Solubility -Solubility and Precipitates -Kinetics and Rate of Reaction -Collision Theory, Reaction Mechanisms, and Catalysts Equilibrium Applications - NaOH - CuSO4 - NaCl - Sugar - Beakers - Computers - Bleach - Fruit juice students so that they may apply the theory learned in class to real problems. Students must be able to predict chemical products, determine the pH of solutions with given acid-base concentrations, and compare strong or weak acids and/or bases. -Properties and Definitions of Acids and Bases -Acid/Base Reactions -Using the Equilibrium Concept with Acids and Bases -Indicators and Acids and Bases Acid/Base Titrations H+, OH-, and Le Châtelier - Vinegar - Baking Soda - Matches - pH meter/strips - Ammonia and other acids or bases - Titration Graphs - Microsoft Excel - pH indicator solutions - Esterification and hydrolysis reactions - Distilled water conveyed to the students. In addition to theory based questions, laboratory work should be used for more hands on experience. Global environmental problems will be introduced and explained through oxidative and reductive reactions. -Oxidation and -Reduction Redox and Half Reactions -Electrochemical and Electrolytic Cells -Redox Reactions with Standard Reduction Potentials -Energy Efficiency of Cells - Batteries - Flash light bulb - Two 30.0 cm lengths of insulated wire - Voltmeter - Salt and distilled water - Zinc, copper, and iron salts - Paperclips, orange, potato, lemon, etc - Magnesium - Matches - Copper(II) sulphate - Zinc - Flatware or jewellery to plate with copper - Electrodes Key Questions - On a hot summer day, why is it possible for the sand to be very hot yet the water is very cold? - Define the term enthalpy. - Define entropy. - Define a practical problem involving energy change. Propose a possible solution. - As a living person my energy exchange position is exothermic. Explain this. - Why is it important for objects to reach room temperature before finding their mass? - Why should you fill a thermos with hot water before filling it with a hot beverage? - Explain the variations in solubility when different pure substances are dissolved in the same solvent. - How can the solubility generalization be used to predict the formation of precipitates. - If like dissolves like, why does sodium chloride dissolve in water? - What information do we need to calculate the molarity of a solution? - What are the advantages of using a catalyst versus increased temperature to increase the reaction rate? - When is it desirable to speed up a chemical reaction? - Describe collision theory. - What is meant by dynamic - Predict products in acid and base reactions. - How does a Ka value relate to the pH of the solution? - How does the pH of human blood stay constant? - Explain why 0.1 M HCl has a low pH. - How do acidbase indicators function? - What is the equivalence point and end point? - Explain which indicators would work best for a chosen set of pH values. - Determine the concentration of acid/base in a solution using stoichiometry. - Design an experiment to test the effectiveness of a series of antacids. - Describe the interactions of the H+ and OH– ions using Le Chåtliers - What does the study of electrochemistry involve? - Explain how the flow of electrons in a flashlight produces light. - Explain why some reactions are spontaneous and others are not. - List explain of redox reactions that occur in your home - Explain the process of electrolysis and electroplating. - Explain how electrical energy is produced in a hydrogen fuel cell. - Compare electrochemical and electrolytic cells in terms of energy efficiency, electron flow/transfer, and chemical change. equilibrium? - If a process is in equilibrium, does that mean nothing is changing? Drawbacks - A unit planned solely on data collection and manipulation will lose students’ attention. Interaction must be added to keep students engaged. - Students who are not mathematically inclined may need extra assistance in order to understand the material. principle. - Students who excel at academic evaluations may be stretched from their comfort zone as there is more of an emphasis on real word problems. - Many of the laboratory exercises require expensive equipment. - Students not able to partake in some laboratory work due to disabilities. - Laboratory precautions may become an issue. - Some initial lab equipment purchases may be outside of the allowable budget but are re-usable. - Repetitive styles of experiments may leave students uninterested in the material. Safety: Throughout these units there are many chemicals that will be used. It is important to train the students to work safely around many of these chemicals, as some are hazardous. It is up to the teacher to provide the students with the knowledge and safety precautions required to use these chemicals. Before starting the semester, a laboratory period informing the students of the safety precautions and procedures for any accidents in the lab should be conducted. The students need to take labs seriously. Before every laboratory experiment, the safety precautions should be stated. Chemicals should be properly stored in cabinets so that chemical stored together will not react with one another. Of the chemicals used the Chemistry 12, some are flammable, combustible and reducing agents, which need to be stored away from oxidizing agents. Acids should be stored away from bases while organics are stored separately from inorganics. Before beginning laboratory work, the teacher should review the MSDSs for the chemicals being used, in the event of any accidents or spills. When participating in laboratory activities that deal with chemicals, teachers and students should always wear safety glasses. Teachers should always practice due diligence and minimize all possible dangers in the laboratory. Resources: 1. Current Textbook: Mustoe, F., Jansen, M. P., Webb, M., Doram, T., Hayhoe, C., Gaylor, J., et al. (2004). Chemistry. Whitby, Ontario, Canada: McGraw-Hill Ryerson Limited. 2. APEF Chemistry Data Booklet (Atlantic Provinces Education Foundation) 3. Nova Scotia Education <lrt.EDnet.ns.ca> 4. Reference Textbook: Chang, R. (2006). General Chemistry: The Essential Concepts. New York, New York, United States of America: McGraw-Hill. 5. Laboratory Workbook (Johnson) 6. WHMIS Sheets 7. CRC Handbook for Physics and Chemistry 8. The Merck Index 9. Johnson, K. (n.d.). Synthesis of Fragrant Esters. Retrieved 09 22, 2009, from <http://faculty.eicc.edu/kjohnson/labbook/physicalscience/esters.pdf> Learning Resources and Technology Website 10. Useful website links < http://www.accessexcellence.org/RC/chemistry.php> 11. AP Chemistry Activities – Possible http://chem.lapeer.org/Chem2Docs/> Laboratory Investigations < 12. Interactive periodic table < http://profmokeur.ca/chemistry/> 13. Chemistry Evaluations – Possible test questions < http://chem.lapeer.org/Exams/> 14. Chemistry Crosswords - < http://users.rcn.com/fvirzi/x-word-home.htm> 15. Journal of Chemical Education - <http://jchemed.chem.wisc.edu/> 16. Learning Outcomes Framework: Science 7-10, Crown Copyright, Province of Nova Scotia, 2008. 17. Atlantic Canada Science Curriculum: Chemistry 12, Crown Copyright, Province of Nova Scotia, 2003. 18. Science Safety Guidelines, Grades Primary – 12, Crown Copyright, Province of Nova Scotia, 2005.