WCLN CHEMISTRY 11 - Rev. Mar/2019
Unit 5 ~ Learning Guide Name: ______________________________
Instructions:
Using a pencil, complete the following notes as you work through the related lessons. Show ALL
work as is explained in the lessons. You are required to have this package completed BEFORE
you write your unit test. Do your best and ask questions if you don’t understand anything!
Chemical Equations:
1. What three things are conserved in a chemical reaction?
2. The reaction which powers the engine in a car is as follows: 2 C6H18 + 21 O2 à 12 CO2 + 18 H2O
A car burns 2000. g of octane gas (C8H18) and uses 7450. g of oxygen gas to do so. If this creates
5850. g of carbon dioxide then how many grams of water are created?
Balancing Equations:
1. What must you NEVER change when balancing an equation?
2. Fill in the following with the correct symbol.
Phase
Solid
Liquid
Symbol
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Gas
Aqueous
WCLN CHEMISTRY 11 - Rev. Mar/2019
3. Balance the following equations by filling in the blanks with the correct coefficient. Use the table
below each reaction to show your work. It is usually easiest to do the element found in the most
compounds LAST and to start with the element that is simplest to balance. An example is
provided for you. where H was balanced LAST and Al was balanced first.
_1__Al4C3 + _12_H2O ® __3_CH4 + _4__Al(OH)3
Reactants
Products
Al 4
Al 1x4 = 4
C3
C 1x3 =3
H 2x12 = 24
H 4x3 =12 + 3x4 = 12 = 24
O 1x12 = 12
O 3x4 = 12
a) ____Mg + ____HCl ® ____MgCl2 + ____H2
Reactants
b) ____BiCl3
+ ____H2S ® ___Bi2S3 + ____HCl
Reactants
c) ____Fe
Products
Products
+ ____O2 ® ___Fe3O4
Reactants
Products
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WCLN CHEMISTRY 11 - Rev. Mar/2019
d) ____H2O2
® ____H2O + ____O2
Reactants
Products
e) ___K2CrO4 + ____HCl ® ____K2Cr2O7 + ____KCl + ____H2O
Reactants
f) ____C6H12O6
Products
+ ____O2 ® ____CO2 + ____H2O
Reactants
Products
g ) ____C8H18 + ____O2 ® ____CO2 + ____H2O
Reactants
Products
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WCLN CHEMISTRY 11 - Rev. Mar/2019
Types of Chemical Reactions:
1. What are the 6 types of reactions you are expected to be able to recognize in Chemistry 11?
2. Please classify the following reactions as one of the 6 types you have learned about. IF you want
extra practice see if you can balance them as well. You may use the following abbreviations of
the types: Syn, Dec, SR, DR, Comb, Neut.
® ___ H2O + ___O2
a) _________________
___ H2 O2
b) _________________
___HCl + ___ NaOH ® ___NaCl +___H2O
c) _________________
___Al + ___ NiBr2 ® ___AlBr3 + ___Ni
d) _________________
___N2 + ___ H2 ® ___ NH3
e) _________________
___AgNO3 + ___ KCl ® ___ AgCl + ___ KNO3
f) _________________
___ C6H6 + ___ O2 ® ___ CO2 + ___ H2O
g) _________________
___Mg + ___ HCl ® ___ MgCl2 + ___ H2
h) _________________
___ Mg + ___ N2 ® ___ Mg3N2
i) _________________
___ Ba + ___ HBr ® ___ BaBr2 + ___ H2
j) _________________
___ BiCl3 + ___ H2S ® ___ Bi2S3 + ___ HCl
k) _________________
___ Br2 + ___ KI ® ___ I2 + ___ KBr
l) _________________
___ Fe + ___ O2 ® ___ Fe3O4
m) ________________
___ C4H10 + ___ O2 ® ___ CO2 + ___ H2O
n) _________________
___ CaO + ___ C ® ___ CaC2 + ___ O2
o) _________________
___ LiOH + ___ HBr ® ___ LiBr + ___ H2O
p) _________________
___ Bi2O3 + ___ H2 ® ___ Bi + ___ H2O
q) _________________
___ P4 + ___ I2 ® ___ PI3
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WCLN CHEMISTRY 11 - Rev. Mar/2019
r) _________________
___ Fe2O3 + ___ C ® ___ Fe + ___ CO2
s) _________________
___ C6H12O6 + ___ O2 ® ___ CO2 + ___ H2O
t) _________________
___ NH4NO3 ® ___ N2O + ___ H2O
u) ________________
___ Al4C3 + ___ H2O ® ___ CH4 + ___ Al(OH)3
v) _________________
___ Ca(OH)2 + ___ CO2 ® ___ Ca(HCO3)2
Energy:
1. State whether each of the following are exothermic or endothermic.
Reaction or Event
Exo or Endo
2 C8H18 + 25 O2 ® 16 CO2 + 16 H2O + 10110 kJ
Ba(OH)2 + 2 NH4Cl + 430 kJ ®
BaCl2 + 2 NH4OH
6 SOCl2 + CoCl2•6H2O ® CoCl2 + 12HCl + 6 SO2 DH = +360 kJ
Mn(s) + 2 HCl(aq) ® MnCl2(aq) + H2(g)
DH = -221 kJ
Boiling Water
Metabolizing Food
The energy possessed by the products is greater than the energy
possessed by the reactants.
2. How much heat is evolved when 30.g of magnesium is burned in excess oxygen gas given the
reaction below:
2Mg + O2 ® 2 MgO
DH = -600. kJ
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WCLN CHEMISTRY 11 - Rev. Mar/2019
Stoichiometry:
1. Use the balanced equation below to answer the following questions.
1 Mg + 2 HCl ® 1 MgCl2 + 1 H2
a) How many moles of hydrogen gas are produced when 10 moles of hydrochloric acid
completely react?
b) What mass of magnesium chloride is produced if 5.75 mol of magnesium reacts complete?
c) What mass of magnesium is needed to react 15.2g of hydrochloric acid?
d) What mass of magnesium is needed to create 87.5 L of hydrogen gas at SATP?
e) How many molecules of hydrogen gas are created if 6.6 mol of hydrochloric acid react with
3.3 mol of magnesium?
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WCLN CHEMISTRY 11 - Rev. Mar/2019
2. Use the balanced equation below to answer the following questions.
2 C8H18(l) + 25 O2(g) ® 16 CO2(g) + 18 H2O(l) + 10110 kJ
a) How many moles of water are created when 108 moles of oxygen gas completely react?
b) How many litres of carbon dioxide gas will be created with 525 L of oxygen gas react
completely at STP? Hint this can be done with a single conversion!
c) How much energy is created if a sample of C8H18 containing 7.63 x 1025 atoms of hydrogen
reacts completely?
d) What volume of carbon dioxide gas at SATP is created in a reaction which produces
5.37x106 kJ of energy?
e) What mass of octane gas (C8H18) is required to create 112 g of water?
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WCLN CHEMISTRY 11 - Rev. Mar/2019
3. To do each of these questions you will need the result from the previous question. The answers
for each are provided but please do your best to try and do them on your own before checking the
answers.
a) If barium hydroxide reacts with ammonium nitrate what type of reaction is occurring?
b) What are the names of the two products of this reaction?
c) Write and then balance the equation for this reaction. Remember you need to make sure to
correctly balance each ion with each other to create the correct chemical formulas.
d) What mass of ammonium hydroxide is created if 26.4g of barium hydroxide reacts
completely?
e) If 37.4 kJ of energy are required for every 2 moles of ammonium nitrate that react how much
energy is required to cause 48.6g of ammonium nitrate to react completely?
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WCLN CHEMISTRY 11 - Rev. Mar/2019
Limiting Reagents:
1. Define the following terms and provide the formula for the third.
a) Limiting Reagent
b) Excess Reagent
c) Percent Yield
2. Consider the following reaction: 2Al + 3 NiBr2
® 2 AlBr3 + 3 Ni.
27.0g of aluminum react with 219g nickel (II) bromide.
a) Which reactant is the limiting reagent? Show your work!
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WCLN CHEMISTRY 11 - Rev. Mar/2019
b) How many mols of excess reagent is left over when the reaction is complete?
ICF Chart
Moles
Excess Reagent
Limiting
Reagent
Product
Product
2 Al
3 NiBr2
2 AlBr3
3 Ni
Initial Mols
Change in Mols
Final Mols
Mass of excess reagent (Al) left over:
c) What mass of aluminum bromide is created in the reaction? Be sure to use the limiting
reagent in this calculation
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WCLN CHEMISTRY 11 - Rev. Mar/2019
3. Answer these questions based on this reaction and the following information
Mn(s) + 2 HCl(aq) ® MnCl2(aq) + H2(g)
DH = -221 kJ
115g of manganese is placed in a 1.25 L of a 3.50 M solution of hydrochloric acid.
a) Which reactant is the limiting reagent? Show your work!
b) How many moles of excess reagent are left over when the reaction is complete? Fill in the ICF
chart to answer this question
ICF Chart
Moles
Excess Reagent
Limiting
Reagent
Product
Product
Mn
2 HCl
MnCl2
H2
Initial Mols
Change in Mols
Final Mols
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WCLN CHEMISTRY 11 - Rev. Mar/2019
c) What is the theoretical mass of hydrogen gas created in the reaction?
d) If 33.6 L of hydrogen gas was measured to have formed at STP what is the percent yield of this
reaction? Hint: You will need to convert this amount to grams!
Answers:
Chemical Equations:
2. 3600. g H2O
Balancing Equations:
3. a) 1,2,1,1
e) 2, 2,1,2,1
b) 2,3,1,6
c) 3,2,1
f) 1,6,6,6
g) 2,25,16,18
d) 2, 2, 1
Energy Hints: The following layout will help you solve this question.
2. ___ g Mg x
&'( )*
___ * )*
+,
x ____ &'( )* =
Energy Answers:
2. 370 kJ
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WCLN CHEMISTRY 11 - Rev. Mar/2019
Stoichiometry Hints: The following layout will help you solve these questions.
&'( 3
4
1. a) ___ mol HCl x ___ &'( 35(
=
&'( 35(
b) ___ mol Mg x
&'( )*
* )*
c) ___ g HCl x ___ * 35( x ___ &'( 35( x ___ &'( )* =
&'( 3
&'(9:;(9< 34
4
e) ___ mol HCl x ___ &'( 35(
x
&'( 5>4
___ +,
___ DE'&< 3
&'( 5 3
x ___ &'(9:;(9B 5CB3
B CB
8 5>
&'( KD(>3)4
B 3CB
=
&'( 5 3
4
&'( L3 >3
* L3 >3
M
M
x ___ &'( KD(>3)
x N &'( L3
4
&'( L3 L>
+,
e) ___ g NHP NOQ x ___ * L3 ML> R x ___ &'( L3
R
M L>R
M >3
=
=
Stoichiometry Answers:
1. a) 5 mol H2
b) 547g MgCl2
d) 85.8g Mg
2. a) 77.8 mol H2O
d) 2.11 x 105 L CO2
3. a) double replacement
c) 5.07g Mg
e) 2.0 x 1024 molecules H2
b) 336 L CO2
c) 3.56 x 104 kJ
e) 78.9g C8H18
b) barium nitrate and ammonium hydroxide
c) Ba(OH)2 + 2 NH4NO3 ® Ba(NO3)2 + 2 NH4OH
d) 10.8g NH4OH
*5 3
e) ___ g H7 O x ___ * 3 4> x ___ &'(B3 CB> x __ &'(B5 CB
3
4
___ * KD(>3)4
+,
x ___ &'( 5
&'( 3 >
4
x ___ &'( 5>
=
M
* )*
4
4
&'(9:;(9 5B3CB
3. d) ___ g Ba(OH)7 x
&'( )*
x ___ &'( 3 x ___ &'( )* =
b) ___ L O7 x ___ 8 > 4 =
4
d) ___ kJ x
4
8 5>
2. a) ___ mol O7 x ___ &'( >4 =
c) ___ atoms H x
&'( 34
___8 34
* )*5(
4
x ___ &'( )*5(
=
=
___ &'( 34
&'( 3 >
d) ___ L H7 x
&'( )*5(4
___ &'( )*
e) 11.4 kJ
Limiting Reagents Answers:
2. a) NiBr2
b) 8.98g NiBr2
c) 177g AlBr3
3. a) Mn
b) 0.189 mols HCl
c) 4.23g H2
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d) 71.6%
4
B CB
=