Chemical Reactions
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Chemical reaction
What can tell us a chemical reaction has occurred? (Think about chemical changes)
Review
What is an ionic compound?
What is a covalent compound?
Ionic or covalent? Draw it.
Remember: Ionic = Metal + nonmetal, covalent = non-metal + nonmetal
CaCl2
CO2
Mg3S2
CF4
NaCl
KCl
H2O
Naming Compounds - If they are ionic..
Cation (metal) keeps the element’s name.
Anion (non-metal) ends in -ide.
Example:
NaCl is Sodium chloride
CaO is Calcium oxide
What do you think KF would be called?
Naming compounds - If they are covalent
Use prefixes
Element found to the right on the periodic table is named second and ends in –ide.
Example:
N2O4 is Dinitrogen tetroxide
H2O is Dihydrogen monoxide
What would be the name of CF4 ?
Chemical equations!
What is the chemical symbol of oxygen?
What is the chemical formula for water?
So what do you think would make up a chemical equation?
Chemical Symbols
Form
Chemical Formulas
which form
Chemical Equations
What makes up a chemical equation?
Reactants
Products
Coefficients
Subscript
How to Balance Equations
The Law of Conservation of Matter
States that matter is neither created nor destroyed during a chemical reaction even though it may change from one form to another.
Because matter is neither created nor destroyed there must be an equal number of atoms of each element in the products as in the reactants.
Types of chemical reactions
Synthesis reaction
Decomposition reaction
Single replacement reaction
Double replacement reaction
Combustion
Synthesis reaction
When two or more substances combine to form a single substance
A + B ------> AB
Decomposition reaction
When a single compound breaks down into simpler compounds.
AB ---> A + B
Single replacement reaction
Double replacement reaction
When the cations of two compounds switch places.
AB + CD ------> CB + AD
Combustion reaction
When substances in a reaction combine with oxygen to produces carbon dioxide and water.