Chemical Reactions Flashcards
The process in which one or more substances is changed into one or more new substances is called…
chemical reaction.
starting materials and are written on the left-hand side of the equation
Reactants
the end result of the reaction and are written on the right-hand side of the equation.
Products
concise representation of chemical reactions
Chemical Equations
the ___ of the reactants and products are written in parentheses to the right of each compound
states
____ are inserted to balance the equation. Tells the number of molecules
coefficients
___ tell the number of atoms of each element in a molecule
Subscripts
Two or more substances react to form one product
Combination Reactions
one substance breaks down into two or more substances
Decomposition Reactions
Rapid reactions that produce a flame. Most often involve hydrocarbons reacting with oxygen in the air
Combustion Reactions
occurs when a more reactive element displaces, or pushes out, a less reactive element from a compound that contains the less reactive element.
Displacement Reaction
came from the Greek word that means “to transpose”
Metathesis
a double decomposition between two electrolytes, where the ions of the reactants exchange places to form new compounds.
Metathesis (Exchange) Reactions
Start by ___ those elements that appear in only one reactant and one product
balancing
Balance those ___ that appear in two or more reactants or products
elements
check to make sure that you have the ____ of each type of atom on both sides of the equation
same number
__ nail is coated in Cu and the solution has changed from a blue color to a greenish color
Fe
___ metal is now coated with Ag and the solution is beginning to take on a slightly blue tint
Cu
___ solution begins to vigorously bubble when the Mg ribbon is added.
HCI
____ are evident as they wisp through the air int othe collecting tube; gas in flammable
Gases
The alcohol vapor in a person’s breath reacts with an orange solution known as potassium dichromate. When alcohol is present, this solution turns green.
Breath Analyzer
compound present in chemistry in metals from the sea
Magnesium Hydroxide
