LAB : CHEMICAL REACTIONS   I.M.S. SCIENCE   MR. SCHAEFERS                                       NAME(S): _________________  __________________

                                 PERIOD: ___ DATE: ___

OBJECTIVE: To conduct a single replacement reaction and others.
     Many compounds react with other compounds. Their are four basic types of reactions: SYNTHESIS, DECOMPOSITION, SINGLE REPLACEMENT, AND DOUBLE REPLACEMENT.  In the following activities we are going to explore some of these reactions.

     SINGLE REPLACEMENT REACTION, used to recover copper from mine water.  In a single replacement reaction, one metal takes the place of another metal (trade places).

MATERIALS:  Tray, GOGGLES, 250 ml beakers, test tubes,aluminium foil, stirring rod, water, copper sulphate, and a data table.

CAUTION: Be careful not to touch the copper sulfate.

                   If touched wash hands immediately!

Cu ( S O4 ) +  Al  + H2 O ----  Al2 ( S O4 ) 3  +  Cu + H2 O  + ___

Weight of the copper sulfate & filter paper            = _______ grams.

Weight difference is weight of copper sulfate          = _______ grams.

 

Add the weight of the Al foil              = _______ grams.
             __________________________________________________________

Total weight of copper sulfate & Al foil before        = _______ grams.

 

Total weight of copper sulfate & Al foil after*        = _______ grams.

             __________________________________________________________            
                     The final weight difference       = _______ grams.

PROCEDURE:       

a. Fill a beaker 1/2 way with cold/ hot water:
                                    Record Temperature = ______

b. Given enough copper sulfate into the test tube to cover the bottom of the test tube. Then with cold water fill the test tube 1/2 full.

c. Place the test tube in the cold/ hot water beaker and insert into the test tube a strip of aluminum foil.         

e. Carefully look at the reaction and observe for the next 15 minutes.

    Can you see the replacement of the metals?  

    Make note of any change you notice.               

                                            Record Temperature = ______

Q1. Which test tube began to react first? _______________________________________________

Why? _______________________________________________

Q2. List color changes you noticed. _______________________________________________

Q3. What is the reddish brown substance at the bottom of the test tube?

    _______________________________________________

Q4. What happened to the aluminium foil? _______________________________________________

Q5. Where did it go? _______________________________________________

Q6. What is the gas given off? _______________________________________________

Q7. How could we test for it? _______________________________________________

Q8. Why was there a difference in the weight of the copper sulfate & foil?

    _______________________________________________