|
Inquiry Questions |
7.1 Apply Le Chatelier’s principle to predict the qualitative effects of changes of temperature, pressure, and concentration on the position of equilibrium and on the value of the equilibrium constant?
8.1 How can I deduce the Brønsted–Lowry acid and base, as well as conjugate acid base pairs in chemical reactions? 8.3 How can we use th pH and the ionic product constant to determine the concentration of H+ and OH- ions? 8.4 How can I investigate the differences in the characteristics of strong versus weak acids and bases? 8.5 How do you balance equations that describe the combustion of sulfur and nitrogen to their oxides and subsequent acids when reacted with water? 18.2 How can [H + (aq)], [OH – (aq)], pH, pOH, Ka , pKa , Kb , and pKb be identified in different acid base problems? 18.2 How can you calculate the pH in a buffer solution? 9.1 How do you deduce the oxidation state of an atom in an ion or a compound? |
7.1 How does a system reach equilibrium and how can you determine the Kc of that equilibrium?
17.1 How does Gibbs free energy change of reaction, the equilibrium constant, as well as the the position of the equilibrium linked together? 8.2 How can we deduce balanced acids and base reaction and use them to identify what acids and bases are needed to make a certain salt? 8.2 How can we identify the concentration of an acid or base using titration? 18.1 How can you explain Lewis theory using nucleophiles and electrophiles? 18.3 How do acid-base indicator change colour depending on the pH? 9.1 How do you determine half equation and overall redox reaction equations? 9.2 How does the electricity flow in a voltaic cell and electrolytic cell? 19.1 What does Gibbs free tell you about a voltaic cell? |
7.1 What is the difference between Q and Kc?
17.1 How does the equilibrium law explain Le Chatelier’s principle for changes in concentration? 8.1 Why can amphiprotic species can act as both Brønsted–Lowry acids and bases? 8.2 What are the observable characteristic chemical reactions of acid with reactive metals, metal oxides, metal hydroxides, hydrogen carbonates, and carbonates? 8.3 What is a pH scale and what does pH indicate? 18.1 What are the differences in the Brønsted–Lowry theory and Lewis theory of acids and bases? 18.2 What are the dissociation constant for weak acids and bases 18.2 What is the relationship between Ka and pKa is pKa = –log Ka and between Kb and pKb is pKb = –log Kb? 18.3 What are the characteristics of the pH curves produced by the different combinations of strong and weak acid and bases? 18.3 What is the relationship between the pH range of an acid–base indicator, which is a weak acid, and its pKa value? 9.2 What is the difference between voltaic cells and electrolytic cells? 19.1 What is electroplating? |
7.1 To what extent to chemical industries benefit by applying Le Chatelier’s principle?
8.5 To what extent does the chemical industry affect the environment? 18.2 To what extent are buffer solution used in industry? 9.1 To what extent is the winkler method useful to protect the environment? 9.2 To what extent do humans rely on voltaic and electrolytic cells |
Unit description
This unit is discussing the principle of equilibriums to apply it to redox reaction and help determine the concentrations of acids and bases at equilibrium. Throughout the unit we are going to focus on real world scenario anchored in the chemical industry.
Transfer Goals
Use their knowledge learned, concepts discussed and skills developed in the topics of acids and bases, equilibria and redox reactions to investigate traditional and alternative farming techniques, explain to thier peers how aquaponics is addressing issues arising when traditional farming techniques are used, as well as teach thier peers how to set up and maintain an aquaponics system.
Link to EdX course
|
|
Essential ideas of Unit
Equilibrium |
Acids and bases |
Redox |
|
7.1 Many reactions are reversible. These reactions will reach a state
of equilibrium when the rates of the forward reaction and reverse reaction are equal. The position of equilibrium can be controlled by changing the conditions. 17.1 The position of equilibrium can be quantified by the equilibrium law. The equilibrium constant for a particular reaction only depends on the temperature. |
8.1 Many reactions involve the transfer of a proton from an acid to a base.
8.2 The characterization of an acid depends on empirical evidence such as the production of gases in reactions with metals, the colour changes of indicators, or the release of heat in reactions with metal oxides and hydroxides. 8.3 The pH scale is an artificial scale used to distinguish between acid, neutral, and basic/alkaline solutions. 8.4 The pH depends on the concentration of the solution. The strength of acids or bases depends on the extent to which they dissociate in aqueous solution. 8.5 Increased industrialization has led to greater production of nitrogen and sulfur oxides leading to acid rain, which is damaging our environment. These problems can be reduced through collaboration with national and intergovernmental organizations. 18.1 The acid–base concept can be extended to reactions that do not involve proton transfer. 18.2 The equilibrium law can be applied to acid–base reactions. Numerical problems can be simplified by making assumptions about the relative concentrations of the species involved. The use of logarithms is also significant here. 18.3 pH curves can be investigated experimentally but are mathematically determined by the dissociation constants of the acid and base. An indicator with an appropriate end point can be used to determine the equivalence point of the reaction. |
9.1 Redox (reduction–oxidation) reactions play a key role in many chemical and biochemical processes.
9.2/ 19.1 Voltaic cells convert chemical energy to electrical energy and electrolytic cells convert electrical energy to chemical energy. Energy conversions between electrical and chemical energy lie at the core of electrochemical cells. |
|
ConnectionsInternational MindednessStudents are going to study the chemical industry and it's impact on the environment. As part of that, students will compare the impacts on the environment in different countries due to the factors in that country, like economy and culture.
Information Communication Technology The website eduex.co is an essential part of the delivery of the principles and concepts creating flipped classrooms and blended learning environments. This also is a used by students as a learning resoruces in thier own independent studies. Students are using thier laptop and varies probes in their practicals. Spreadsheets, data logging, graph plotting and computer modelling are part of experiments in the lab. ATL skills Thinking Gather and organize relevant information to formulate an argument Research Use critical-literacy skills to analyse and interpret media communications LP Studens will need to think critically and creatively when analysing data, discussing real world scenarios etc. CAS Water analysis in the school and the park next to it. Raising awareness after testing local water quality. Testing pH and oxygen level (BOD) using the winkler method - use a student's IA as an example Topic 9. REDOX. Students might make some research on the water supply in the school and in the area nearby and take some decisions |
