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WorksheetsBalancing Equations Practice
Total questions: 25
Worksheet time: 37mins
N2+O2--> _NO
Which equation is balanced?
PbO2 + 2H2
SO2 + H20 --> H2SO4
2Na + 2H2O --> 2NaOH + H2
Mg + __HCl ---> MgCl2 + H2
What law governs the balancing of chemical equations?
Law of Energy
Law of Conservation of Matter/Mass
Law of Gravity
Law of Matter Movement
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
What are the coefficients that would properly balance this equation?
__Ca + __H2O --> __Ca(OH)2 + __H2
2,1 --> 2,1
1,2 --> 1,1
1,2 --> 2,4
1,2 --> 2,1
Al(NO3)3 + _ NaOH -> Al(OH)3 + 3 NaNO3
What is the left part of a chemical equation called?
2H2 + O2 ---> 2H2O
Reactants
Yields
Products
Chemical equation
What is the right part of a chemical equation called?
2H2 + O2 ---> 2H2O
Reactants
Yields
Products
Chemical Equation
How many Mn atoms are found in the following compound?
2MnO4
1
2
4
8
What is the little number after an element in a chemical equation called?
Example: H2
Coefficient
Atom
Subscript
Equation
Is the following equation balanced?
Al + O2 ---> 2Al2O3
YES
NO
What is the number before a chemical formula called?
Example: 2H2 + O2 ---> 2H2O
Coefficient
Atom
Subscript
Equation
Which of the following equations are correctly balanced?
12CO2 + H2O ---> C6H12O6 + O2
CO2 + H2O ---> 3C6H12O6 + O2
CO2 + 9H2O ---> C6H12O6 + O2
6CO2 + 6H2O ---> C6H12O6 + 6O2
4Ca(OH)2
Ca + AlCl3 --> CaCl2 + Al
Synthesis
Decomposition
Single replacement
Double replacement
3Mg + N2 --> Mg3N2
Synthesis
Decomposition
Single replacement
Double replacement
NO2 --> N2 + O2
Synthesis
Decomposition
Single Replacement
double replacement
AgF + CaCl2 ---> AgCl + CaF2
double replacement
decomposition
single replacement
synthesis
Which type of reaction is described in the following equation:
C3H8 + 5O2 → 3CO2 + 4H2O
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion
Is the following equation balanced?
4Fe + 3O2 ---> 2Fe2O3
YES
NO
The number of atoms you begin with in a chemical reaction...
must be the same as the number of atoms you end with
must be an even number
can be different to the number you finish with
changes depending on how much energy is formed
