CH221 - 11:00                                QUIZ 3 (10 minutes)                                   Practice


 

Select the best single answer for each question:

1. Which is NOT a strong electrolyte in water?

A) HCl  
B) NaOH
C) KBr
D) AgI   
E) H2SO4 
   

 2. Which of the following is least soluble in water?

A) Fe2(SO4)3 
B) K2S 
C) Ag2CO3  
D) Sn(NO3)
   

 3. Which of the following is least soluble in water?

A) BaS 
B) BaSO4 
C) BaCl2    
D) Ba(OH)2  
   

4. The ionic compound ZnI2 is ________ in water.

A) soluble    
B) insoluble 
    

5.  The ionic compound AgNO3 is ________ in water.

A) soluble    
B) insoluble 
    

6.  The ionic compound PbS is _________ in water.  
A) soluble    
B) insoluble  
    


7. Which mixture of aqueous solutions does NOT produce a solid precipitate?

         
A) Ba(NO3)2 and Na2CO3    
B) Ca(OH)2 and KF 
C) CuSO4 and NH4Cl   
D) K2SO4 and Pb(NO3)2  
   

8. What is the total concentration of ions in an aqueous solution that is 0.126 M CaCl2 ? 

A) 1.88 1023 
B) 0.378 M    
C) 0.252 M 
D) 0.164 M  
E) 0.00 M  
   

9.  What is the final concentration of NaCl after 500 mL of water is added to 1 L of 0.68 M NaCl ?

A) 0.34 M 
B) 0.61 M  
C) 0.27 M
D) 0.56 M  
E) 0.45 M