WorksheetsBalancing Equations Test Review
Total questions: 12
Worksheet time: 12mins
Name
Class
Date
1.
PCl5 + ___ H2O → ___ HCl + H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
2.
Mg + ___ HCl → MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
3.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
4.
Which side of a chemical equation os the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
5.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
6.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
7.
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
8.
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
9.
___ Al + ___ Br2 -----> ____ AlBr3
a)
3, 2, 2
b)
2, 3, 2
c)
3, 2, 2
d)
1, 2, 3
10.
___ NaClO3 ----> ___ NaCl + ___ O2
a)
1, 3, 2
b)
2,3,2
c)
2, 2,3
d)
3, 2, 2
11.
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.
12.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
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