Font size
S
M
L
XL
WorksheetsBalancing Chemical Equations
Total questions: 23
Worksheet time: 31mins
Name
Class
Date
1.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
2.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
3.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction.
4.
How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H2
Mg + __HCl ---> MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
5.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
6.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
Mg and MgO
c)
MgO
d)
O and MgO
7.
Balance this equation:
H2 + Cl2 ---> HCl
a)
It is balanced.
b)
H2 + Cl2 ---> 2HCl
c)
3H2 + Cl2 ---> 6HCl
d)
H2 + 3Cl2 ---> 6HCl
8.
2HI --> H2 + I2
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
9.
Pb(NO3)2 + KI --> PbI2 + KNO3
What type of reaction is this?
What type of reaction is this?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
10.
Zn + H2S --> ZnS + H2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
11.
CH4 + O2 --> CO2 + H2O
a)
single replacement
b)
double replacement
c)
acid base
d)
combustion
12.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
13.
Is the following reaction balanced?
Ca+CuF2→CaF2+Cu
a)
Yes
b)
No
14.
How many Carbon atoms are there in the following compound?
C4OH10
a)
1
b)
4
c)
10
d)
14
15.
Determine the coefficients to balance the chemical equation.
___Al + ___O2--> ___Al2O3
a)
4, 1, 2
b)
4, 3, 4
c)
3, 4, 1
d)
4, 3, 2
16.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
17.
One element replaces another in a compound.
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
18.
This pictures simulates what type of reaction?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
19.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
20.
Hydrocarbon fuel + oxygen ----> ___+____
(Select 2)
a)
CO2
b)
O2
c)
H2O
d)
CxHy
21.
Is combustion a reversible reaction?
a)
Yes.
b)
No.
22.
What type of reaction is H2 + N2 → NH3
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Combustion
e)
None of these
23.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
Reset
