Intro to Chemical Equations
A substance present at the start of reaction, always found on the Left side of the equation
What are reactants?
Whole numbers that are placed in front of formulas in an equation in order to balance it
What are coefficients?
A chemical change in which two or more substances react to form in a single new substance
What is a combination or synthesis reaction?
CxHy + O2 --> H2O + CO2
What is a combustion reaction?
The symbol (s) represents this state of matter
What is a solid?
A substance produced in a chemical reaction, always found on the Right side of the equation
What are products?
You have this when each side of the equation has the same number of atoms of each element and mass is conserved
What is a balanced equation?
A chemical change in which an element or compound reacts with oxygen
What is combustion?
A + B ---> AB is this type of reaction
What is a synthesis reaction?
The small number to the right of elements in a chemical equation
What is a subscript?
In a chemical reaction the arrow sign --> represents this
What is yields or produces?
This coefficient is needed in front of Hydrogen to balance the following equation
____ H2 + O2 ---> 2 H2O
What is two (2)?
A chemical change in which the parts of two different compounds switch places with another to form two new compounds
What is a double replacement reaction?
AB + CD ---> AD + CB represents this type of reaction
What is a double replacement reaction?
This law states that matter is neither created nor destroyed in a chemical reaction.
What is the Law of Conservation of Mass/Matter?
This is used to separate reactants or products in a chemical reaction
What is a plus sign "+"?
The coefficient is needed in front of Oxygen to balance the following equation
4 Al + __ O2 ---> 2Al2O3
What is three (3)?
A chemical change in which a single compound breaks down into two or more simpler products
What is a decomposition reaction?
AB ---> A + B represents this type of reaction
What is a decomposition reaction?
Five ways you know a chemical reaction has occurred
What are (1) color change, (2) gas production, (3) change in odor, (4) precipitate formation, (5) emission of energy?
How many substances do you need for a chemical reaction to occur?
What is at least one?
The coefficient needed in front of the Silver nitrate to balance the following equation
____ AgNO3 + Cu ---> Cu(NO3)2 + 2Ag
What is two (2)?
A chemical change in which one element replaces a second element in a compound.
What is a single replacement reaction?
A + BC ---> B + AC is this type of chemical reaction
What is a single replacement reaction?
The coefficient needed in front of oxygen needed to balance the following equation
2C8H18 + ____O2 ---> 13CO2 + 18H2O
What is 22?