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1. How many moles of nitrate ions are present in 50.0 mL of 0.400 M calcium nitrate solution?

a) 0.0200 mole

b) 5.00 moles

c) 0.0400 mole

d) none of these

2.  Which of the following will be the result of adding HCl to lead(II) nitrate solution?

a) Pb(s)

b) H₂(g)

c)   PbCl₂(s)            

d) none of these

3. Which of the following is a weak electrolyte?

a) ammonia

b) HBr(aq)

c) CsI(aq)

d) none of these

4. A solution is prepared by dissolving 1.50 g of   BaCl₂  in enough water to make 250.0 mL of solution. What is the concentration of barium chloride in this solution?

a) 0.0347 M

b) 0.0288 M

c) 0.00720 M

d)  none of these

5. Zinc and hydrochloric acid react according to the following chemical reaction:

    Zn(s) + 2HCl(aq) à H₂(g) + ZnCl₂(aq)

If 30.0 mL of 0.500 M HCl reacts with excess zinc, how many moles of hydrogen gas could be produced?

a) 0.0300 mole

b) 0.250 mole

c) 0.0150 mole

d) none of these

6. Which of the following wil be a result of mixing   CuBr₂(aq)   and KOH(aq) ?

a) KBr(s)

b) Cu(OH)₂(s)                 

c) HBr(aq)

d) none of these

7. Which of the following will result from adding aluminum metal to Fe(NO₃)₂   solution?

a) There will be no reaction.

b) Fe(s)

c)  Al(NO₃)₃(s)                 

d) none of these

8. Which of the following are water soluble?

a) ZnCO₃                

b) PbI₂                

c)  SrSO₄                                     

d) none of these

10. Which of the following results from mixing chromium metal and sulfuric acid?

a) There is no reaction.

b)  Cr₂(SO₄)₃(s)                  

c)   H₂(g)               

d) none of these

11. Briefly explain the difference between a strong electrolyte and a weak electrolyte. Type your explanation in the box below.

                   

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