This is an in-class exercise to be used at the end of General Chemistry (II). I use it as a capstone exercise at the end of my second semester genchem course, but it would also make an excellent introductory review exercise at the beginning of a junior level inorganic course. It provides an excellent review of topics from the entire semester (electrochemistry, acid-base, thermodynamics, colligative properties, solution chemistry and calculations) and shows how they are inter-related in a real world application (a car battery).
• A student should be able to dissect the shorthand notation for a voltaic cell and convert that to a balanced redox equation in acidic conditions. • A student should be able to use the Nernst equation to calculate the potential of the battery at non standard conditions. • A student should be able to apply Hess' Law to calculate basic thermodynamic properties for a balanced equation. • A student should be able to calculate concentration of solutions, and to discuss the applicability of these different units. • A student should be able to use his/ her knowledge of colligative properties (both concept and calculation) to discuss the effect of temperature on a battery. • A student should be able to apply his/her knowledge of LeChatelier's Principle to make predictions about the effect changes in conditions will have on the state of a battery.