Before class on Feb. 1,
- Please watch the following 2 videos (7 min, 21 min)
- Complete the notes while watching the videos;
- Make a comment
Second video (21 min)
chemistry matters
exploring the pleasure of finding things out
Before class on Feb. 1,
Second video (21 min)
chemistry matters 
In these videos I learned how to find the value of an equilibrium constant. When concentrations are known, this involves simply substituting the values in and solving. When not all concentrations/pressures are known, a rice table must be created. In a rice table you write the reaction, the initial concentration/pressure, the change in concentration/pressure, and the pressure/concentration at equilibrium. Not all the information is given, so equilibrium pressures and concentrations are found by first looking at the change in concentration. Since the concentration changes proportionally as shown in the reaction, the change of one can be found by the concentration of another and the coefficients in the reaction. Once the equilibrium concentrations are found, they can be substituted into the equilibrium constant equation.
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In exercise 15.7, why do the atmospheres not cancel out? 2/4 is 1/2, wouldn’t tbat leave atms in the bottom?
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In this lesson I learned how calculate K when only some initial concentrations are known. Using a RICE table helps organize our information and what we know. After determining all of the concentrations in the RICE table, we can substitute and calculate the equilibrium constant.
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In these videos, I learned how to calculate the value of K when concentrations are known and when only some initial concentrations are known.
Question: Do we include units in our equation?
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