Name _______Answer Key_________________
Review for Unit 5-Types of Reactions…..
I can balance Chemical Equations.
1. 2NaOH
+
CuSO4
2. FeCl3
+
Al
 Cu(OH)2 + Na2 SO4
 Fe + Al Cl3
Balanced
I can identify the molar ratio of a chemical equation.
3. H2SO4
+
2 KOH
 2 H2O + K2SO4
What is the molar ratio of the equation above? ____1:2:2:1______________
4. 2 C4H10
+
 10 H2O + 8 CO2
13 O2
What is the molar ratio of the equation above? ____2:13:10:8______________
I can identify types of chemical reactions (combustion, single replacement, etc) There is a video available
on my staff page to review if you would like.
What type of chemical reactions are these?
5. NaOH
+
HCl
 NaCl + H2O Double replacement
6. 2 Al(OH)3 + 3 Mg  2 Al + 3 Mg(OH) 2
Single Replacement
I can predict products knowing the type of chemical reaction.
7. Ca(ClO3)2
2 Li  2 LiClO3
+
8. 2 HCl
+
Mg
+
Ca
 MgCl2 + H2
I can determine which reactant is limiting in a chemical reaction.
3 H2SO4 + 2 Al 
9.
Al2(SO4)3
+
3 H2
What is the mole ratio for this chemical reaction? ___3:2:1:3_
Moles of
Moles of Al
H2SO4
Maximum moles
Limiting
of H2 produced
Reactant
Excess Reactant
a. 6 moles
2 moles
3 moles of H2
Al
H2SO4
b. 8 moles
4 moles
6 moles of H2
Al
H2SO4
Show your work!!
a. 6 moles of H2SO4 ( 3 moles H2) = 6 moles of H2 b. 8 moles of H2SO4 ( 3 moles H2) = 8 moles of H2
3 moles of H2SO4
3 moles H2SO4
2 moles of Al ( 3 moles H2) = 3 moles of H2
4 moles of Al ( 3 moles H2) = 6 moles of H2
2 moles Al
I can calculate molar mass.
10. What is the molar mass of LiOH? Show your work.
2 moles Al
6.94 g of Li + 16.00 g of O + 1.01 g of H = 23.95 g of LiOH
11. What is the molar mass of CaCO3? Show your work.
40.08 g of Ca + 12.01 g of C + 3(16.00 g of O) = 100.09 g of CaCO3
I can identify signs that a chemical reaction has taken place.
12. What are 6 observations you would be able to make that would indicate a reaction has taken place.
1. Gas is produced
2. Temperature increase or decrease
3. Precipitate formed
4. Energy (light) is released
5. Unexpected color change
6. Explosion
Remember there is a video on these, if you would like a visual to look at for review. Video is on staff
webpage, Donna Andren. Under Concepts Chem.
13. I can summarize what we learned from the Iron/Sulfur Lab and the Precipitate Lab and connect them to the
learning targets for the unit.
FeS Lab
-type of reaction
-identify molar ratio
-how did we know a chemical reaction took place?
-calculate molar mass
Precipitate lab
-type of reaction
-identify molar ratio
-how did we know a chemical reaction took place?
-calculate molar mass
-predict products
-balance equations
These are all things we did in the two labs that relate to the learning targets. Can you give examples from the
lab that connect to these learning targets?