Date
Name
Section
Team
Instructor
REPORT SHEET
Chemical Reactions and Equations
LAB
10
A. Magnesium and Oxygen
Shiny light gray ribbon of metal
1. Initial appearance of Mg
2. Evidence of chemical reaction Heat and light energy produced
White ash produced
3. Balance:
Mg(s) + O2(g)
4. Type of chemical reaction:
*
MgO(s)
*
B. Zinc and Copper(II) Sulfate
Time
CuSO4 (aq ) Zn(s) Appearance
Appearance
1. initial
2. after
30 min
Blue/green Dull gray
Lt blue
3. Zn(s) + CuSO4(aq)
Black
Cu(s) + ZnSO4(aq)
Evidence of a
Chemical Reaction
Change in color
*
4. Type of chemical reaction: *
C. Reactions of Metals and HCl
Metal
1. Appearance of Metals
2. Evidence of a Chemical
Reaction
Zn(s)
Gray, shiny pebbles
Formation of bubbling
Cu(s)
Orange, shiny strips
Mg(s)
Light gray, shiny strips
No change
Formation of many bubbles
Heat produced
3. Zn(s) + HCl(aq)
ZnCl2(aq) + H2(g)
Cu(s) + HCl(aq)
*
NR
Mg(s) + HCl(aq)
MgCl2(aq) + H2(g)
*
4. Type of chemical reaction:
Zn: *
Cu: No apparent reaction
Mg: *
D. Reactions of Ionic Compounds
D1 Reaction of CaCl 2 and Na3PO4
Reactants
1. Appearance of
Solutions
CaCl2 (aq)
Clear and colorless liquid
Na 3PO4 (aq)
Clear and colorless liquid
3. CaCl2(aq) + Na3PO4(aq)
2. Evidence of a Chemical
Reaction
Formation of a white solid
Ca3(PO4)2(s) + NaCl(aq)
*
4. Type of reaction:: *
D2 Reaction of FeCl 3 and KSCN
Reactants
1. Appearance of
Solutions
2. Evidence of a Chemical
Reaction
FeCl3 (aq)
Orange liquid
KSCN( aq)
Clear, colorless liquid
Change in color to blood
red
3. FeCl3(aq) + KSCN(aq)
Fe(SCN)3(aq) + KCl(aq)
*
4. Type of reaction: *
E. Sodium Carbonate and HCl
Reactants
1. Appearance of
Reactants
HCl(aq )
Clear, colorless liquid
Na 2CO3 ( s)
White, crystalline solid
2. Evidence of a Chemical
Reaction
Formation of many bubbles
3. Observation of burning match or splint: It immediately went out.
What caused the change in the burning match or splint?
Lack of oxygen from the CO2 gas formation, displacing air.
4. Na2CO3(s) + HCl(aq)
CO2(g) + H2O(l) + NaCl(aq)
*
5. Type of reaction: *
F. Hydrogen Peroxide
Reactants
1. Appearance of
Reactants
2. Evidence of a Chemical
Reaction
H 2O2 (aq)
Clear, colorless liquid
Formation of bubbles
*
4. Type of chemical reaction: *
3. H2O(l)
H2O(l) + O2(g)
Questions and Problems
Q1 What evidence of a chemical reaction might you see in the following cases? Refer
to Table 10.1.
a. dropping an Alka-Seltzer tablet into a glass of water
*
b. bleaching a stain
*
c. burning a match
*
d. rusting of an iron nail
*
Q2 Balance the following equations:
a. Mg(s) + HCl(aq) 
 H2(g) + MgCl2(aq)
 Al2O3(s)
b. Al(s) + O2(g) 
*
*
c. Fe2O3(s) + H2O(l) 
 Fe(OH)3(s)
*
 Ca(NO3)2(aq) + H2O(l)
d. Ca(OH)2(aq) + HNO3(aq) 
*
Q3 Write a balanced equation for each of the following reactions. Write the correct
formulas of the reactants and products and the states of each.
a. Liquid pentane (C5H12 ) and oxygen (O 2 ) gas react to form carbon dioxide
and water.
C5H12(l) + O2 (g) 
 CO2(g) + H2O(l)
*
b. Sodium and water react to form sodium hydroxide and hydrogen gas (H 2 ).
Na(s) + H2O(l) 
 NaOH(aq) + H2(g)
*
c. Iron and oxygen (O 2 ) gas react to form iron(III) oxide.
Fe(s) + O2(g) 
 Fe2O3(s)
*
Q4 Classify each reaction as combination, decomposition, single replacement,
double replacement, or combustion.
a. Ni(s)  F2 (g ) 
 NiF2 (s)
*
b. Fe2O3 (s)  3C(s) 
 2Fe(s)  3CO(g )
*
c. CaCO3 (s) 
 CaO(s)  CO2 (g )
*
d. H2SO4 (aq)  2KOH(aq) 
 K 2SO4 (aq)  2H 2O(l )
*
e. C2H4 (g )  3O2 (g ) 
 2CO2 (g )  2H 2O(g )
*
Q5 Complete and balance each of the following chemical reactions by writing the
correct formulas of the product(s) that forms:
Type of Reaction
a. 2 Zn(s) + 1 CuBr2(aq) 
 2 ZnBr(aq) + 1 Cu(s)
 2 HCl(aq)
b. 1 H2(g) + 1 Cl2(g) 
c. 1 MgCO3(s) 
 1 MgO(s) + 1 CO2(g)
 1 KNO3(aq) + 1 AgCl(s)
d. 1 KCl(aq) + 1 AgNO3(aq) 
*
*
*
*