Acids & Bases – Problem Set #3

 1)    For each reaction listed, identify the proton donor (acid), the proton acceptor (base), the conjugate acid and the conjugate base:

 

a.    H2PO4-(aq)  +  H2O(l)  ?  H3PO4(aq)  +  H3O+(aq) 

 

 

b.    H2O(l)  +  Cl-(aq)  ?  OH-(aq)  +  HCl(aq)

 

 

c.    NH3(aq)  +  H2PO4-(aq)  ?  NH4+(aq)  +  HPO42-(aq) 

 

 

2)    For each of the following salts, predict whether an aqueous solution would be acidic, basic, or neutral.

a.  AgI                                b.  KNO3                                 c.  Cu(NO3)2 

d.  CaSO4                         e.  BaCO3                               f.  NaCl

 

3)    A solution of Al(OH)3 is found to have a [OH-] of 3.72 x 10-5 M.  What is the [H3O+] of this solution?  What is the pH of this solution?  What is the pOH of this solution?  Is this solution acidic or basic?

 

4)    You have made a solution of 5.00 x 10-4 M HNO3.  What is the [H3O+] of this solution?  What is the [OH-] of this solution?  What is the pH of this solution?  What is the pOH of this solution?  Is this solution acidic or basic?

 

5)    You have made a solution of 3.25 x 10-6 M H2SO4.  What is the [H3O+] of this solution?  What is the [OH-] of this solution?  What is the pH of this solution?  What is the pOH of this solution?  Is this solution acidic or basic?

 

6)    You have made a solution of 1.99 x 10-2 M NaOH.  What is the [H3O+] of this solution?  What is the [OH-] of this solution?  What is the pH of this solution?  What is the pOH of this solution?  Is this solution acidic or basic?

 

7)    You have made a solution of 4.50 x 10-8 M LiOH.  What is the [H3O+] of this solution?  What is the [OH-] of this solution?  What is the pH of this solution?  What is the pOH of this solution?  Is this solution acidic or basic?

 

8)    In lab, you discover the pH of your solution to be 3.45.  What is the [H3O+] of this solution?  What is the [OH-]?  Is this solution acidic or basic?  What is its pOH?

 

9)    In lab, you discover the pH of your solution to be 8.23.  What is the [H3O+] of this solution?  What is the [OH-]?  Is this solution acidic or basic?  What is its pOH?

 

10) In lab, you discover the pOH of your solution to be 3.45.  What is the [H3O+] of this solution?

 

11) What is the pOH of a 3.34 x 10-3 M solution of H2SO4?

 

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