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Chapter 7 Chemical Reactions-Terms

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Katherine Marks

on 21 January 2014

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Transcript of Chapter 7 Chemical Reactions-Terms

Chapter 7 Chemical Reactions -Terms
A substance that undergoes change in a chemical reaction.
New substances formed as a result of a chemical reaction.
A representation of a chemical reaction in which the reactants and products are expressed as formulas.
Chemical Equation
By: Katherine Marks 7th hour
Numbers that appear before a formula in a chemical equation to show that relative proportions of each reactant and product.
An amount of a substance that contains approximately 6.02 x 10^23 particles of the substance.


mixed to make a complex product.
were lumpy and impossible to separate.
It felt like the
chemical equation
would never balance.
You can never change subscripts when balancing an equation but you can add
to make it balance.
Learning about
takes some studying to understand.
The mass of one mole of a substance.

Molar Mass

molar mass

of water is about 18g/mol.
A chemical reaction in which two or more substances react to form a single substance.
Synthesis Reaction
Synthesis Reaction
is one of the most common types of chemical reactions.
A chemical reaction in which a compound breaks down into two or more simpler substances.
Decomposition Reaction
The general form for a
decomposition reaction
is AB A + B.
A chemical reaction in which one element takes the place of another element in a compound.
Single-Replacement Reaction
An example of
Single-Replacement Reaction
is when magnesium replaces hydrogen in water to make magnesium hydroxide and hydrogen gas.
A chemical reaction in which two compounds exchange positive ions and form two new compounds.
Double-Replacement Reaction
Double- replacement reaction
is generally in the form of AB + CD AD + CB.

A chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light.
Combustion Reaction
Combustion Reaction
is exothermic, meaning it produces heat.
A chemical reaction in which electrons are transferred from one reactant to another.
Oxidation-Reduction Reaction
In our bodies a sequence of
oxidation-reduction reactions
are used to burn sugars and fatty acids.
The energy stored in chemical bonds.
Chemical Energy
Dry wood is a store of
chemical energy
A chemical reaction that releases energy to its surroundings.
Exothermic Reaction
Exothermic reactions
generate energy, an example is fuel combustion.
A chemical reaction that absorbs energy from its surroundings.
Endothermic Reaction
Endothermic reaction
needs energy to work, an example is melting ice.
The rate at which reactants change into products over time.
Reaction Rate
Some substance's
reaction rate
is much quicker than others.
A substance that affects the rate of a chemical reaction without being used up in the reaction.
To speed up reactions you can add a
A state in which the forward and reverse paths of a physical or chemical change take place at the same rate.
A see-saw who's loads are even, is an example of an
A chemical reaction in which the conversion of reactants into products and the conversion of produces into reactants happens at the same time.
Reversible Reaction
An example of
reversible reaction
is going left or right and arriving at your destination.
Full transcript