May 02, 2007

What we did in class today:
[+] Corrected Chapter 19 Worksheet
[+] Chemical Kinetics Test was given back
[+] Worksheet on Concentration vs. Time Graph
was handed out
[+] Chapter 18 Chemical Equilibrium
Worksheet was given to work on


We didn't really do much lesson today, but the
Concentration vs. Time Graph was explained.

* However, here are some things that we should remember!

- When the system is initially at equilibrium & a stress is added, after an instantaneous change, the system will allow to reestablish equilibrium.

- When reaction is at equilibrium, the concentration of both reactant and product are constant.

- When more reactant is added, the concentration of the reactant increases immediately. As the reactant is consumed in the reaction, its concentration decreases to a constant value. Therefore, more product is formed and the concentration of the product increases to a new constant value, which reestablish a new equilibrium position.

- When a reactant is removed, the concentration of the reactant decreases immediately. As more reactant is being produced its concentration increases to a new constant value. Therefore, the product can no longer be form at the same rate, so the concentration of the product decreases to a new constant value, which reestablish a new equilibrium position.

- Also remember that when adding a catalyst, it does not speed up the reaction, but stays unchanged.
Tomorrow's scribe is Sean.