NEW
Font size
S
M
L
XL
Worksheets8E Balancing Equations
Total questions: 34
Worksheet time: 57mins
Name
Class
Date
1.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
d)
Left side is balanced
2.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
3.
Which side of a chemical equation is the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
4.
Which problem is balanced?
a)
PbO2 + 2H2--> H2SO4
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
d)
2Na + 2H2O --> 2NaOH + H
5.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
6.
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
7.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
8.
Balance this equation
_N2 + _H2 --> _NH3
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
9.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
10.
The blue numbers in the image below represent ________
a)
Charges
b)
coefficients
c)
subscripts
d)
none of the answers are correct
11.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
6
c)
8
d)
24
12.
Finish a blalanced equation:
Mg(OH)2 --> __________
Mg(OH)2 --> __________
a)
Mg(OH)2 --> MgOH
b)
Mg(OH)2 --> MgO+ H2O
c)
Mg(OH)2 --> MgO+ H2
d)
Mg(OH)2 --> Mg+ H2O
13.
Balance this equation:
P4+O2 --> P2O3
P4+O2 --> P2O3
a)
3 P4+ O2 --> 2 P2O3
b)
P4+ O2 --> 2 P2O3
c)
P4+ 3 O2 --> 2 P2O3
d)
P4+ 2 O2 --> 3 P2O3
14.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
15.
Balance this equation,
Al2O3 --> Al + O2
Al2O3 --> Al + O2
a)
Cannot be balanced
b)
2Al2O3 --> 2Al+3O2
c)
2Al2O3--> 4Al+3O2
d)
3Al2O3--> 2Al+O2
16.
Which elements are(is) not balanced?
LiNO3 +CaBr2 --> Ca(NO3)2 + LiBr
LiNO3 +CaBr2 --> Ca(NO3)2 + LiBr
a)
Li
b)
Ca and Li
c)
O and N
d)
Ca
17.
Which of the following has the most number of O?
a)
2Mg3(PO4)2
b)
4AlPO4
c)
3Al(NO3)3
d)
15KOH
18.
Balance the equation:
Si(OH)4+NaBr--> SiBr4+NaOH
Si(OH)4+NaBr--> SiBr4+NaOH
a)
Si(OH)4+2NaBr--> SiBr4+NaOH
b)
Si(OH)4+4NaBr--> SiBr4+4NaOH
c)
Si(OH)4+NaBr--> SiBr4+4NaOH
d)
Si(OH)4+2NaBr--> SiBr4+2NaOH
19.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
20.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
21.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
22.
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
23.
KNO3 --> KNO2 + O2
What coefficients are needed to balance the reaction?
What coefficients are needed to balance the reaction?
a)
2, 2, 1
b)
2, 3, 2
c)
1, 2, 2
d)
1, 3, 1
24.
Balance this equation-
__P4 + __O2 --> __P2O3
__P4 + __O2 --> __P2O3
a)
it is already balanced
b)
2, 1, 3
c)
1, 2, 3
d)
1, 3, 2
25.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
26.
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
27.
PCl5 + ___ H2O → ___ HCl + H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
28.
__ Al + __ FeO → Al2O2 + __ Fe
a)
1, 1, 2
b)
2,1,2
c)
2, 2, 2
d)
2,4,2
29.
Mg + ___ HCl → MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
30.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
31.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
32.
Which equation is balanced?
a)
PbO2 + 2H2--> H2SO4
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
d)
2Na + 2H2O --> 2NaOH + H
33.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
34.
What coefficient belongs with hydrochloric acid?
Mg + ___ HCl → MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
Reset
