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Chemical Reactions - Review
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A reaction in which chemical bonds are broken or formed.
Chemical Reaction
Chemical substances that are used in a reaction
Reactants
Chemical substances that are produced in a reaction.
Products
True or False? During a chemical reactions, the atoms are simply rearranged into new combinations.
True
True or False? During a chemical reaction, no atoms are lost and no new atoms are produced.
True
True or False? Many chemical reactions require energy or release it. This causes the temperature to decrease or increase
True
True or False? Phase change is an evidence of a chemical reaction.
False
Type of reaction, which requires more energy to be supplied than it releases. (Absorb heat energy)
Endothermic
What evidences suggest a chemical reaction has taken place? (Two)
Color Change; Gas Released; Smells; Precipitate Forms; Temperature Change
Type o reaction in which heat energy is released by forming the chemical bonds in the product.
Exothermic
Corrosive substances that eats away and erodes other materials. (e.g. Sulfuric *****)
Acids
Some substances can neutralize acids and are thought of as the opposite of acids.
Bases
Bases that dissolves in water.
Alkalis
Acids and alkalis can be measured on the ................
pH scale
The midpoint of the pH scale, a ph of 7, represents a solution that is neither acidic or alkaline.
Neutral
pH can be tested with a substance called an ..............
Indicator
When an acid reacts with a base, the reaction is called a .................
neutralization reaction
Substance formed when an acid is neutralized by a base or alkali.
Salt
Metals can react with the oxygen in the air. They react to form a ........
metal oxide
The list of metals reactivity is called ...................
The reactivity series.


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