Chemical Reactions
Miscellaneous
Balancing Chemical Equations
How to Balance Equations
Types of Reactions
100
What is the Reactant of the chemical equation and where is it located?
The reactant is the original equation and it is always located on the left side of the equation.
100
By definition, the Law of Conservation of Mass states that matter (mass) may not be __________ nor _________ .
What is created / destroyed.
100
Balance the following equation: _____H2 + ____O2 ---> ____H2O
2 H2 + 1O2 ---> 2H2O
100

The law of conservation of mass states that mass is neither ________ or ____________

Created or destroyed 

100

Identify the type of reaction: Na + Cl —> NaCl

Synthesis 

200
What is the Product of a chemical equation and where is it located?
The product is the chemical change or new substance. It is always located on the right side of the equation.
200

Physical or Chemical Change: a match burning. 

Chemical 

200
Balance the following Equation: _____KClO3 ---> KCl + ______O2
2KClO3 ---> 2KCl + 3O2
200

Which part of the chemical equation are you to add or change.

The Coefficients

200

Identify the type of reaction: LiBr —> Li + Br2 

Decomposition 

300
Identify the reactants and products in the following chemical equation: H2 + NaCl ---> H2Na + Cl + S
Reactants: H, Na, Cl Products: H, Na, Cl, S
300

An ice cube exposed to heat, resulting in a puddle of liquid water.

Physical

300
Balance the following equation: ____C3H8 + _____O2 ---> ____CO2 + ____H2O
1C3H8 + 5O2 ---> 3CO2 + 4H2O
300
Within a chemical formula, if you don't see a subscript, you can conclude that there are how many atoms of that element within each molecule.
One
300

Identify the type or reaction: Na + MnO -> Mn + Na2O

Single Replacement 

400
What does the law of conservation of mass states?
The law of conservation of mass states that matter durning a chemical change can neither be created nor destroyed.
400

Physical or chemical change: The breaking of a glow-stick, resulting in the emission of light.

Chemical

400
Balance the following equation: ____P + _____O2 --->_____P2O5
4P + 5O2 ---> 2P2O5
400

Identify the type of reaction: CH4 + 202 -> CO2 +2H20

Combustion 

500
What is the meaning of a subscript? Also, how many atoms does each element have in the following chemical equation: NaOH + H2CO3 ---> Na2CO3 + H2O *Note - All the numbers are subscripts
A subscript is written below. Reactant - 1Na, 4O, 3H, 1C Product - 2Na, 1C, 4O, 2H
500
This is a way to speed chemical reactions.
Answers may vary, but should include: higher temperature, higher concentration of reactants, or increased surface area.
500
Balance the following equation: ___NaBr + ____CaF2 ---> ____NaF + ____CaBr2
2NaBr + 1CaF2 ---> 2NaF + 1CaBr2
500

What is one reason that we balance chemical equations?

To validate that the Law of Conservation of Mass is true.

500

Identify the type or reaction: H2SO4 + Ca(OH)2 -> CaSO4 + 2H2O

Double replacement 

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