WorksheetsChapter 5 Test Review
Total questions: 46
Worksheet time: 23mins
What type of reaction is NaOH + HCl --> NaCl + HOH
Double Replacement
Single Replacement
Synthesis
Combustion
CaCO₃ -> CaO + CO₂
Single replacement
Double replacement
Decomposition
Synthesis
P₄ + 3 O₂ -> 2 P₂O₃
Synthesis
Double replacement
Single replacement
Decomposition
What type of reaction is shown here: MgO = Mg + O
Synthesis
Single replacement
Double replacement
Decomposition
Double Replacement
A + B --> AB
AB + CD --> AC + BD
Pb + FeSO₄ -> PbSO₄ + Fe
Synthesis
Single replacement
Double replacement
Decomposition
In what kind of reaction do two or more substances combine to form a new compound?
Synthesis
Decomposition
Combustion
Ionic
Single Replacement
A + B --> AB
AB + C --> A+ BC
AB + CD --> AD + CB
AB --> A + B
1Fe₂O₃ +3H₂SO₄ -> 1Fe₂(SO₄)₃ +3H₂O
Synthesis
Single Replacement
Double Replacement
Decomposition
What type of reaction is 2 H2O2 --> 2 H20 +O2
Synthesis
Single replacement
Double Replacement
Decomposition
Law of Conservation of Mass
Matter is created and destroyed
Matter is neither created nor destroyed
Matter is not created but it is destroyed
Matter is created but not destroyed
__Fe +__O₂ → __Fe₂O₃
2,1,2
4,4,1
4,3,2
4,3,1
K + N2 —> K3N
6,1,2
6,2,1
6,3,2
6,2,2
H2 + O2 -> H2O
2,2,2
4,3,2
2,1,2
4,3,1
__Na + __MgF₂ → __NaF + __Mg
1,2,1,2
2,1,2,1
4,1,4,1
__Sn + __HF → __SnF₂ + __H₂
1,2,1,2
1,1,2,1
1,2,1,1
4,1,4,8
SiO2 + H4 -> SiF4 + H2O
1,4,1,2
2,1,1,2
2,4,1,2
1,2,1,2
The law of conservation of mass states that matter cannot be created nor
changed
destroyed
measured
changed into another state
In the chemical reaction: Na + Cl → NaCl what is/are the reactant(s)?
Na only
Na and NaCl
Na and Cl
NaCl
What is the number “4” in SiCl₄?
a coefficient
a product
a subscript
a reactant
Coefficient
copper oxide plus carbon yields copper plus carbon dioxide
A chemical reaction that breaks down compounds into simpler products.
A number placed in front of a chemical formula in an equation to tell you how many atoms or molecules of a reactant or a product take part in the reaction.
Carbon plus oxygen yields carbon dioxide
Subscripts
tell the ratio of elements in a compound
a chemical equation must show the same number of each type of atom on both sides of the equation
represents elements on the periodic table
new substances that form once the reaction is complete
What do chemical equations tell you?
copper oxide plus carbon yields copper plus carbon dioxide
A number placed in front of a chemical formula in an equation to tell you how many atoms or molecules of a reactant or a product take part in the reaction.
a chemical equation must show the same number of each type of atom on both sides of the equation
tell you the substances you start with in a reaction and the substances you get at the end.
Reactants
substances that you start with in a chemical reaction.
a chemical equation must show the same number of each type of atom on both sides of the equation
reads as "yields" - it means a reaction has happened.
represents elements on the periodic table
Products
A chemical reaction when two or more elements or compounds combine to make a more complex substance
A chemical reaction that breaks down compounds into simpler products.
new substances that form once the reaction is complete.
states that in a chemical reaction, the total mass of the reactants must equal the total mass of the products.
Arrow in a chemical reaction
reads as "yields" - it means a reaction has happened.
a chemical equation must show the same number of each type of atom on both sides of the equation
A chemical reaction when two or more elements or compounds combine to make a more complex substance
tell the ratio of elements in a compound
Synthesis
A chemical reaction that breaks down compounds into simpler products.
A chemical reaction when two or more elements or compounds combine to make a more complex substance
substances that you start with in a chemical reaction.
states that in a chemical reaction, the total mass of the reactants must equal the total mass of the products.
Example of a synthesis chemical reaction
tell you the substances you start with in a reaction and the substances you get at the end.
A chemical reaction that breaks down compounds into simpler products.
Carbon plus oxygen yields carbon dioxide
Represents elements on the periodic table
decomposition
states that in a chemical reaction, the total mass of the reactants must equal the total mass of the products.
A chemical reaction that breaks down compounds into simpler products.
reads as "yields" - it means a reaction has happened
tell you the substances you start with in a reaction and the substances you get at the end.
Replacement
a chemical reaction in which one element replaces another in a compound, or when two elements in different compounds trade places
represents elements on the periodic table
substances that you start with in a chemical reaction
A chemical reaction that breaks down compounds into simpler products.
What is an endothermic reaction?
a temperature change that releases heat.
a temperature change that both releases and absorbs heat.
a temperature change that absorbs or takes in heat
a temperature change that stays the same
Which is NOT a sign of a chemical reaction?
a temperature change
a color change
getting a haircut
formation of a precipitate
Most chemical reactions are known as this _________ because they can NOT be undone.
irreversible
reactants
endothermic
precipitate
What is the definition of a precipitate reaction?
When one chemical changes to tell us that there is another chemical present
When two liquids form a solid
When a liquid/liquid or liquid/solid mixture creates a gas.
the process by which one or more substances change to produce one or more different substances.
A gel ice pack getting cold after you put it in the freezer for an hour is an example of a _____________
chemical change
neither a chemical or physical change
physical change
both a chemical and physical change
Where are the reactants/raw materials found in a chemical formula/equation?
on the left side of the equation.
in the middle of the equation
on the right side of the equation
Which of the following is a chemical property?
Color
Smell
Rusting
State if matter
A chemical reaction that absorbs energy is called-
exothermic
endothermic
both
neither
What does subscript represent?
The number of atoms in an element
The number of compounds
The number of molecules in a compound
The total number of atoms in a compound
Which of the following equations is balanced?
N2 + 3 H2 --> 2 NH3
N2 + H2 --> NH3
2 N2 + 3 H2 --> 2 NH3
2N2 + 2 H2 --> 2 NH3
In an exothermic reaction, what has more energy?
Products
Reactants
In an endothermic reaction, what has more energy?
Products
Reactants
When the temperature of a reaction is increased,
the rate of the reaction increases
the heat destroys the reactants
the rate of the reaction decreases
the rate of the reaction stays the same
When balancing a chemical equation, what are you changing?
products
reactants
coefficients
subscripts
In a balanced chemical equation,
coefficients are equal
atoms are conserved
molecules are equal
energy is not conserved
Chemical reactions...
don't change the reactants into another substance
Form a new substance with new properties
Form a new substance with the same properties
