The idea of reversibility of reaction is vital in a variety of chemical systems at different scales, ranging from the processes that release carbon dioxide into our atmosphere to the reactions of ions within individual cells in our bodies. Processes that are reversible will respond to a range of factors and can achieve a state of dynamic equilibriu...m. In this unit, students investigate acid-base equilibrium systems and their applications. They use contemporary models to explain the nature of acids and bases, and their properties and uses. This understanding enables further exploration of the varying strengths of acids and bases. Students investigate the principles of oxidation and reduction reactions and the production of electricity from electrochemical cells.
    Through the investigation of appropriate contexts, students explore the ways in which models and theories related to acid-base and redox reactions, and their applications, have developed over time and through interactions with social, economic, cultural and ethical considerations. They explore the ways in which chemistry contributes to contemporary debate in industrial and environmental contexts, including the use of energy, evaluation of risk and action for sustainability, and they recognise the limitations of science in providing definitive answers in different contexts.
    Students use science inquiry skills to investigate the principles of dynamic chemical equilibrium and how these can be applied to chemical processes and systems. They investigate a range of electrochemical cells, including the choice of materials used and the voltage produced by these cells. Students use the pH scale to assist in making judgments and predictions about the extent of dissociation of acids and bases and about the concentrations of ions in an aqueous solution.
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    Chemistry Articles, Chemistry Demonstrations

    The Ammonium Dichromate Volcano

    Description A small conical heap of orange ammonium dichromate is ignited. It sparks and produces a large volume of green chromium (III) oxide as well as steam, resembling a volcano. Apparatus Bunsen burner, heatproof mat. Metal tray such as a large tea tray. Watch glass. Bell jar (optional). One 1L conical flask (optional). One 250mL conical flask...
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    ITERATIONS: A GENERAL METHOD FOR SOLVING IONIC EQUILIBRIUM PROBLEMS

    Liberato Cardellini Dipartimento di Scienze dei Materialie della Terra Universita, Via Brecce Bianche 60131 Ancona, Italy INTRODUCTION An important part of every general chemistry curriculum is the treatment of ionic equilibrium problems in aqueous solution. In this topic, two important aspects of stoichiometric calculations are treated: 1) the con...
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    NSW Branch Nyholm Youth Lecture and SA Branch D.R. Stranks Memorial Youth Lecture - Oxygen, Life and Count Dracula

    Roy Tasker and Kris Basden University of Western Sydney, Nepean What colour is liquid oxygen? Is Bugs Bunny a vampire under treatment? Why does garlic keep Count Dracula away? Why is eating too much bacon and orange juice unhealthy? How can a submerged mouse breathe in liquid without drowning? Why do babies born to smokers weigh about 5% lighter th...
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    NSW Branch Nyholm Youth Lecture Oxygen - Friend or Foe?

    Peter Southwell-Keely University of New South Wales Introduction In this lecture I shall briefly summarise the history of the world from an oxygen point of view, say something of the discovery of oxygen, why we need it, its use as a chemotherapeutic agent and its toxicity. I shall then give some examples of reactions which demonstrate its reactivit...
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    IMMUNOSUPPRESSION IN TRANSPLANTATION

    Michael J.B. Moore University of Canterbury Private Bag 4800 Christchurch, New Zealand INTRODUCTION The kidney transplant has become both a routine and common practice over the latter half of the 20th century. The procedure has a high success rate reflecting the low risk involved in this operation relative to other more complex transplants such as ...
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    A COLOURFUL DEMONSTRATION OF THE HENDERSON-HASSELBALCH EQUATION

    M.A. HOOPER School of Chemistry, University of Sydney, NSW,2006 The reaction of dry ice, CO 2 (s), with water or dilute sodium hydroxide solution has long been used to demonstrate the colours of universal indicator. The bubbling and clouds of condensing water vapour make it popular with students. By increasing the concentration of the sodium hydrox...
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    Chaos in Chemistry

    Jeff Hughes Royal Melbourne Institute of Technology The basis of modern Chaos theory is the search for underlying order in apparent randomness. The common idea of chaos is that of a system without any apparent pattern or order - out of control. This seems to imply that a system behaving this way has no underlying rules governing its behaviour. Ther...
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    The Leighton Address 1996 Cerebral Chemistry

    G. Johnston University of Sydney Chemistry is making many contributions to our increased understanding of brain function. Simple chemicals serve as neurotransmitters mediating the transfer of information between nerve cells by activating chemically complex receptors. All nerve cells in the brain have receptors for the inhibitory neurotransmitter, G...
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    The Chemistry of Acid Mine Drainage

    Richard T. Lowson Australian Nuclear Science and Technology Organization Brian J. Reedy and James K. Beattie University of Sydney Acid Mine Drainage (AMD) is a major environmental hazard for the mining industry. The magnitude of the hazard grows as the mining industry grows to meet modern material demand. The hazard arises due to the exposure of re...
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