Chem Lab

It’s due within 30 hours from now

EQUILIBRIUM:

 

 (1.5 marks) Write the expression for the equilibrium constants for the following

reactions:

a. N2(g) + 3H2(g) 2NH3(g)

b. 2SO

2(g) + O2(g) 2SO3(g)

c. NH

3(g) + HCl(g) NH4Cl(s)

 
 
 

(3 marks – 1 here, 2 on next page) For reaction 2(a) above, suppose equilibrium has been

established. Explain how and why the position of equilibrium will shift in response to the

following changes:

a. Additional nitrogen is added to the system.

b. Ammonia is removed from the system as it forms.

c. The pressure on the system is increased.

 
 
 

(1.5 marks) A 1.00 mL sample of dilute acetic acid required 23.4 mL of 0.10 M sodium

hydroxide solution to titrate the sample to a phenolphthalein endpoint (which is assumed to be close in pH to the equivalence point). What was the concentration of acetic acid in the sample (show your work)? How many significant figures are justified in your answer? Why?