GIA 8-4 Writing Keq from chemical equations                                                                   NAME: ___________
Unit 8: Ch. 18.2                                                                                             

1.       For the following chemical equations write the Keq expression.

  1. PCl5(g) пр PCl3(g) + Cl2(g)

 

 

  1. N2(g)  + 3H2(g)  пр 2NH3(g)

 

 

  1. 2S(s)  +  3O2(g)  пр 2SO3(g)

 

 

2.      Only those substances in a chemical equation that are gases or aqueous are included in the Keq expression.  Write the Keq for these:

  1. AgCl(s) пр Ag+(aq) + Cl-(aq)

 

 

  1. Ca2+ (aq)  +  CO32- (aq)  пр  CaCO3 (s)

 

  

  1. Co(H2O)62+ (aq)  +  4Cl- (aq) пр  CoCl42- (aq)  +  6H2O (l)

 

 

3.   If Keq for rxn 1(a) is 132, what can you say about the relative amount of products and reactants at equilibrium?  If Keq for rxn 2(a) is 1.77 x 10-10, what can you say about whether the equilibrium is product or reactant favored?