Vocabulary that Matters
Chemical Equations and Reactions
Balancing Act
Who Dat?
Miscellaneous
100

When one or more substances are changed into new substances this is called a _________ __________.

 chemical reaction

100
In chemical reactions the -> symbol stands for this.
What is yields?
100

When balancing equations never change the __________.

Subscript

100
If there is one product in your equation, then you have this type of reaction.
What is a synthesis reaction?
100

What is the number written below a chemical symbol called?

subscript

200

When the number of atoms is equal on each side we say that the equation is this.

balanced

200

Put this reaction into a balanced chemical equation:

water and iron solid yield iron (iii) oxide solid and hydrogen gas

3H2O(l) + 2Fe(s) -> Fe2O3(s) + 3H2(g)

200

These are used to help balance chemical equations.

coefficients

200
This chemical reaction has the generic formula of: AB --> A + B
What is a decomposition reaction?
200

AB  -->  A   +   B is the general formula for a ________ reaction.

Decomposition

300

The substances you start with in a chemical reaction are called the ___________.

Reactants

300

In the chemical reaction, Mg + O -> MgO, the compound MgO represents the _________.

 product 

300
Balance the following chemical equation. You must show all work and simplify your answer. Fe + O2 --> Fe2O3
4 Fe + 3O2 --> 2Fe2O3
300

A combustion reaction always produces what two substances?

 carbon dioxide and water

300

The term ____________ means that heat is released.

Exothermic

400

The substances that are made in a chemical reaction are called the ___________.

Products

400

Put this reaction into a balanced chemical formula:

solid silicon and chlorine gas yield silicon tetrachloride liquid

Si(s) + 2Cl2(g) -> SiCl4(l)

400
Balance the following equation. You must show all work and simplify your answer! Li + Br2 --> LiBr
2Li + Br2 --> 2LiBr
400

When atoms from 2 compounds switch places, this type of reaction occurs.  AB  +  CD  -->  CB   +  AD

What is a double displacement reaction?

400

What type of reaction is this :

 2Na + 2H2O --> 2NaOH + H2

 single replacement reaction

500

A combination of symbols and numbers written out that show the chemical reaction is called a chemical ________.

chemical equation

500

We must balance chemical equations in order to satisfy the Law of Conservation of _________.

Mass

500
Balance the following equation. You must show all work and simplify your answer! C6H6 + O2 --> CO2 + H2O
2C6H6 + 15O2 --> 12CO2 + 6H2O
500

When atoms in a double replacement reaction switch places the positive charged atom (metal) will always switch with the other ________.

positive charged atom (metal)

500

Give 2 things that effect the rate of a chemical reaction. (Remember the web quest)

Heating, concentration of reactants, reactants state (surface area), catalyst, etc.

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