Chem 2 Labs    WS99    
Postlab for Lab #404   LeChatelier's Principle

(1) Write out the equilibrium-constant expression for the following
   
  (a)   Pb(Cl)2 (s)   <=>  Pb2+ (aq)   +    2Cl- (aq)









  (b)  Al(OH)3 (s)   <=>  Al3+ (aq)   +    3OH- (aq)








 
  (c)  Al2(C2O4)3  (s)   <=>  Al3+ (aq)   +    3C2O4- (aq)










(2)  Briefly explain in your own words what Le Chatelier's Principle is.