Writing Balanced Chemical Equations - Questions

The Writing Balanced Chemical Equations Concept Builder is comprised of 36 questions. The questions are divided into 18 different Question Groups and spread across three different activities. Questions in the same group are rather similar to one another. The Concept Builder is coded to select at random a question from each group until a student is successful with that group of questions.

There are three different activities that can be engaged in through the Concept Builder. Those three actvities are differentiated as follows:
 

• Predicting Products: Question Groups 1-6 ... Students are presented with a verbal description of a reaction that uses reaction type worods like combustion, synthesis, decomposition, single replacement, and double replacement. They must use what they know about these reaction types in order to predict the chemical formula of the products.
• Writing Chemical Equations 1: Question Groups 7-12 ... Students are presented with a verbal description of a reaction. They must identify the chemical formulae for the reactants and products. Then they must insert coefficients in front of the formula to balance the equation. The reactions include one decompsoition, one double replacement, and four synthesis reactions. 
• Writing Chemical Equations 2: Question Groups 13-18 ... Students are presented with a verbal description of a reaction. They must identify the chemical formulae for the reactants and products. Then they must insert coefficients in front of the formula to balance the equation. The reactions include two combustion, two double replacement, and two single replacement reaction types. 

The questions from each group are shown below. Teachers are encouraged to view the questions in order to judge which activities are most appropriate for their classes. 

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Writing Balanced Chemical Equations

 

 
Writing Chemical Reactions
 
Activity 1 Predict the Products
Question Group 1
Question 1
Propane gas -C₃H₈- undergoes combustion. Predict the formulae of the two products of the reaction.
 
CO₂ and H₂O
C₃O₂ and HO
C₃O₂ and H₂O
C₃O₂ and H₈O₂
CO₂ and C₂H₈O₂
 
 
Question 2
Butane gas -C₄H₁₀- undergoes combustion. Predict the formulae of the two products of the reaction.
 
CO₂ and H₂O
C₄O₂ and HO
C₄O₂ and H₂O
C₄O₂ and H₁₀O₂
CO₂ and C₃H₁₀O₂
 
 
 
 
Question Group 2
Question 3
Ammonia (NH₃) decomposes into its elements. Predict the formulae of the two products of the reaction.
 
N and H₂
N and H₃
N₂ and H₂
N₂ and H₃
NH and H₂
 
 

 
Question 4
Water decomposes into its elements. Predict the formulae of the two products of the reaction.
 
H and O₂
H₂ and O
H₂ and O₂
HO and H
HO and O₂
 
 
 
 
Question Group 3
Question 5
Aluminum and copper(II) sulfate undergo a single replacement reaction. Predict the formulae of the two products of the reaction.
 
Cu and AlSO₄
Al₂Cu₃ and SO₂
Cu and Al₄(SO)₃
Cu and Al₂(SO₄)₃
Cu₂ and Al₂(SO₄)₃
 
 
Question 6
Aluminum and copper(II) chloride undergo a single replacement reaction. Predict the formulae of the two products of the reaction.
 
Cu and AlCl
Cu and AlCl₂
Cu and AlCl₃
Al₂Cu₃ and Cl
Al₂Cu₃ and Cl₂
 
 
 
 

 
Question Group 4
Question 7
Sodium chloride and fluorine undergo a single replacement reaction. Predict the formulae of the two products of the reaction.
 
Na and FCl
Na and F₂Cl
NaF₂ and Cl
NaF and Cl₂
NaF₂ and Cl₂
 
 
Question 8
Potassium chloride and fluorine undergo a single replacement reaction. Predict the formulae of the two products of the reaction.
 
K and FCl
K and F₂Cl
KF₂ and Cl
KF and Cl₂
KF₂ and Cl₂
 
 
 
 
Question Group 5
Question 9
Potassium iodide and lead(II) nitrate undergo a double replacement reaction. Predict the formulae of the two products of the reaction.
 
K₂Pb and INO₃
KNO₃ and PbI₂
KPb and I(NO₃)₂
K(NO₃)₂ and PbI
K(NO₃)₂ and PbI₂
 
 
Question 10
Potassium chloride and lead(II) nitrate undergo a double replacement reaction. Predict the formulae of the two products of the reaction.
 
K₂Pb and ClNO₃
KNO₃ and PbCl₂
KPb and Cl(NO₃)₂
K(NO₃)₂ and PbCl
K(NO₃)₂ and PbCl₂

Question Group 6
Question 11
Sodium phosphate and silver(I) nitrate undergo a double replacement reaction. Predict the formulae of the two products of the reaction.
 
AgN and PO₄NO₃
Ag₄PO and NaNO₃
Ag₃PO₄ and NaNO₃
Ag(PO₄)₃ and Na₃NO
Ag₃N and PO₄(NO₃)₃
 
 
Question 12
Copper(II) hydroxide and sodium phosphate undergo a double replacement reaction. Predict the formulae of the two products of the reaction.
 
Cu₂Na and PO₄OH
Cu₂PO₄ and NaOH
Cu₃PO₄ and Na(OH)₂
CuNa₂ and PO₄(OH)₃
Cu₃(PO₄)₂ and NaOH
 

 
Activity 2 Writing Equations 1
Question Group 7
Question 13
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Nitrogen reacts with oxygen to form nitrogen dioxide.
 
 
Question 14
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Aluminum reacts with nitrogen to form aluminum nitride.
 
 
 
 
Question Group 8
Question 15
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Aluminum reacts with bromine to form aluminum bromide.
 
 
Question 16
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Sodium reacts with oxygen to form sodium oxide.
 
 
 
 
Question Group 9
Question 17
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Magnesium oxide is synthesized from its elements.
 
 

 
Question 18
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Calcium oxide is synthesized from its elements.
 
 
 
 
Question Group 10
Question 19
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Manganese(III) iodide decomposes into its elements.
 
 
Question 20
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Potassium chloride decomposes into its elements.
 
 
 
 
Question Group 11
Question 21
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Silver(I) sulfate reacts with barium chloride to produce silver(I) chloride and barium sulfate.
 
 
Question 22
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Lead(II) nitrate reacts with aluminum chloride to form lead(II) chloride and aluminum nitrate.
 
 

 
Question Group 12
Question 23
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Titanium reacts with nitrogen to form titanium(IV) nitride.
 
 
Question 24
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Iron reacts with nitrogen to form iron(III) nitride.
 
 
 
 
Activity 3 Writing Equations 2
Question Group 13
Question 25
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Methane, CH₄, undergoes combustion.
 
 
Question 26
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Propane, C₃H₈, undergoes combustion.
 
 
 
Question Group 14
Question 27
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Ethanol, C₂H₆O, undergoes combustion.
 
 

 
Question 28
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Butanol, C₄H₁₀O, undergoes combustion.
 
 
 
 
Question Group 15
Question 29
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Barium chloride and sodium sulfate undergo a double replacement reaction.
 
 
Question 30
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Silver(I) nitrate and sodium sulfate undergo a double replacement reaction.
 
 
 
 
Question Group 16
Question 31
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Lead(II) nitrate and ammonium hydroxide undergo a double replacement reaction.
 
 
Question 32
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Barium hydroxide and potassium carbonate undergo a double replacement reaction.
 
 
 
 

 
Question Group 17
Question 33
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Fluorine reacts with aluminum chloride in a single replacement reaction.
 
 
Question 34
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Chlorine reacts with aluminum bromide in a single replacement reaction.
 
 
 
 
Question Group 18
Question 35
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Magnesium and copper(I) chloride undergo a single replacement reaction.
 
 
Question 36
The sentence below describes a chemical reaction. Write and balance the equation for this reaction.
 
Aluminum and copper(II) chloride undergo a single replacement reaction.