Reactants Lab. In this experiment we discovered three types of chemical reactions, Single and Double Replacement reactions, along with Neutralization Reaction.

 Aspect 3:        Materials:  

• Spot Plate
• Forceps
• Squeeze Bottle filled with water
• Toothpick

List of Reactants

Fig. 1.1

List of Chemical Reactions

Fig. 1.2                  

Procedure: 

1. Wash spot plate thoroughly with water from squeeze bottle.                                        

2. Choose a combination of reactants from Fig. 1.1

3. Write down physical properties of reactants.

4. Mix reactants. Record observations.

5. Wash spot plate thoroughly, making sure reactants fall into a waste bucket.

6. Repeat steps 1-4 using all the other combinations

Data Collection and Processing (DCP)

Aspect 1:         Observation Chart of Chemical Reactions

        Fig. 1.3

Aspect 2:        Processing Data        

Chemical Reactants and Products Equations Balanced

H2SO4(aq) + Ba(OH)2(aq) --> BaSO4(s) + 2HO2(l)(Double Replacement Reaction)

Mg(OH)2 (s) + 2 HCl (aq) -- > MgCl2 (s) + 2H2O (l)(Neutralization Reaction)

NaC2H3O2 (aq) + HCl (aq) --> HC2H3O2 (aq) + NaCl (aq) (Double Replacement Reaction)

Ca (s) + 2HOH (l) -->Ca(OH)2 (aq) + H2(g)(Single Replacement Reaction)

CuSO4 (aq) + Zn (s) ---> ZnSO4 (aq) + Cu (s)(Single Replacement Reaction)

CoCl2 (aq) + 2NaOH (aq) -->2 NaCl (aq) + Co(OH)2 (aq)(Double Replacement Reaction)

Mg (s) + 2HCl (aq) --> MgCl2 (aq) + H2 (s)(Single Replacement Reaction)

Cl2 (aq) + 2NaBr (aq)  --> 2NaCl (aq) + Br2 (l) (Single Replacement Reaction)

2Al (s) + 3CuCl2 (aq) --> 2AlCl3 (aq) + 3Cu (s) (Single Replacement Reaction)

Aspect 3:        Reactants, Products, and Types of Reaction Chart

                                

Conclusion and Evaluation (CE)

Aspect 1:        Conclusion:  In this experiment we discovered three types of chemical reactions, Single and Double Replacement reactions, along with Neutralization Reaction. Referring to Data in Aspect 2 & 3 of Data Collection and Processing, we can see there were 5 single replacement reactions, and 4 double replacement reactions (one of which was a neutralization reaction). The reactions involving an element and a compound were all single replacement reactions, and the reaction involving two compounds were double replacements (which included a neutralization reaction).

Aspect 2:        Evaluate the Procedure: A problem with this procedure is that it doesn’t explore all types of chemical reactions. Also, try as one may, it is sometimes difficult to get the residue of a substance off the spot plate. This tampers with results.

Aspect 3        Improving Experimental Design: A few more reactions should be added where simple composition and decomposition are shown. Also, using the Bunsen burner, a reaction should be added where hydrocarbon combustion is shown.

        Disposable spot plates should be used, to ensure that residue left by previous reactants and reactions, do not tamper with results.