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WorksheetsChemical Reactions Review
Total questions: 35
Worksheet time: 20mins
A representation of a chemical reaction is known as
skeleton equation
catalyst
chemical equation
product
Equation that shows just the formulas of the reactants and products
chemical equation
single replacement reaction
double replacement reaction
skeleton equation
Small whole numbers that are placed in front of the formulas in an equation in order to balance it.
subscript
catalyst
coefficient
products
What does the above symbol mean
a catalyst has been added to a reaction
heat has been added to a reaction
it is an aqueous solution
it is a reversible reaction
When two or more substances combine to form a single substance
synthesis
decomposition
single replacement
double replacement
A compound is broken into two or more products
synthesis
decomposition
single replacement
combustion
When one element replaces another in a compound.
combustion
synthesis
single replacement
double replacement
The products of a chemical reaction are on the
Left side (Products → Reactants)
Right side (Reactants → Products)
The law of conservation of mass states that
The mass of a system (reaction) increases from beginning to end
The mass of a system (reaction) stays the same from beginning to end
The mass of a system (reaction) decreases from beginning to end
A precipitate is
Rain
Snow
A solid formed in a chemical reaction
Condensation formed in a chemical reaction
In the diagram, letter E represents a
subscript
coefficient
product
equation
Which is the product in the reaction shown?
Al2O3
Al
O2
How does the mass of products compare to the mass of reactants in a chemical reaction?
reactants = products
reactants > products
reactants < products
In the reaction shown below, 12 grams of AB break down into 8 grams of product A and an unknown amount of product B.
Using the law of conservation of mass, what will the mass of product B be?
4 grams
8 grams
12 grams
20 grams
How many molecules of KNO3 are shown?
1
2
3
4
Examine the following chemical reaction: H20 + CO2 → C6H12O6 + O2 What are the products?
H20 + CO2
→
C6H12O6 + O2
H20 + CO2 → C6H12O6 + O2
Substances that start a chemical reaction are known as the
reactants
products
chemicals
substances
Choose the correct coefficients that balance the following equation.
Ca + N2 --->Ca3N2
1,3,3
2,3,1
3,1,1
4,1,3
What type of reaction is occuring?
2 FeCl3 --> 2 Fe + 3 Cl2
synthesis
decomposition
single replacement
double replacement
What are the NEW substances produced in a chemical reaction called?
reactants
products
polyatomic ions
solutions
What type of reaction
is occurring?
Al + 3 Ag(NO3)--> 3 Ag + Al(NO3)3
synthesis
decomposition
single replacement
double replacement
Identify the reactants in this chemical reaction.
Ca + F2--> CaF2
Ca
F2
Ca + F2
CaF2
What type of reaction is occuring?
FeCl2 + CaBr2 --> CaCl2 + FeBr2
synthesis
decomposition
single replacement
double replacement
Identify the product(s) in this chemical reaction.
Ca + F2 --> CaF2
Ca
F2
CaF2
Ca and F2
The purpose of a catalyst is to:
speed up a reaction
slow down a reaction
create more reactants
stop the reaction
Chemical reactions happen when molecules
Like each other
Collide into one another
Explode
Melt
Based on the activity series, will this reaction occur?
Cu (s) + H2O (l) →
Yes
No
Will silver react with magnesium chloride solution?
yes
no
Which compound is higher in reactivity, Ag or Ca?
Ag
Ca
Neither
They're equal
Will silver react with magnesium chloride solution?
yes
no
