Chemistry 30
CH30-EQ1
Consider, qualitatively and quantitatively, the characteristics and applications of equilibrium systems in chemical reactions.
SI, DM, TPS
Indicators for this outcome
| (a) | Discuss why most chemical reactions do not proceed to completion. (K) |
| (b) | Discuss the criteria (e.g., closed system, constancy of properties and equal rates of forward and reverse reactions) that characterize an equilibrium system. (K) |
| (c) | Analyze graphs of the concentrations of reactants and products with respect to time in chemical reactions which approach equilibrium, chemical reactions which achieve equilibrium and chemical reactions which undergo a change in equilibrium. (K, S) |
| (d) | Write the equilibrium constant (Keq) expression for a variety of chemical reactions. (K, S) |
| (e) | Recognize that equilibrium constant (Keq) values are dependent upon pressure (for gases only) and temperature but are independent of concentration and the presence of a catalyst. (K) |
| (f) | Explain why solid and liquid phases have no effect on the value of an equilibrium constant. (K) |
| (g) | Interpret Keq values to determine whether the concentration of products, reactants or neither is favoured once equilibrium has been reached. (S) |
| (h) | Perform calculations involving Keq and the equilibrium concentrations of reactants and products. (S) |
| (i) | Solve problems related to chemical equilibrium, using Initial concentration, Change in concentration and Equilibrium concentration (ICE) charts. (K, S) |
| (j) | Predict the shifts in equilibrium caused by changes in temperature, pressure, volume, concentration or the addition of a catalyst, using Le Chatelier's principle. (S) |
| (k) | Construct a model or design an experiment that demonstrates the concepts of equilibrium and/or Le Chatelier's principle. (STSE, S) |
| (l) | Describe the Haber process, its historical significance and societal impacts. (STSE, K, A) |
| (m) | Describe ways in which industry manipulates chemical reactions to change the equilibrium point to make processes economically viable. (STSE, K, A) |
| (n) | Examine how the concepts of reversible reactions and equilibrium apply to biological systems. (STSE) |
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