Intro to Chemical Equations
A substance present at the start of reaction, always found on the Left side of the equation
What are reactants?
Small 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?
A list of metals in order of decreasing reactivity used
What is the Activity series of Metals?
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 combination or synthesis reaction?
A chemical equation that does NOT indicate the relative amounts of the reactants and products
What is a skeleton equation?
In a chemical reaction the arrow sign --> represents this
What is yields or produces?
What coefficient is needed in front of Hydrogen to balance the following equation
H2 + O2 ---> 2 H2O
What is two (2)?
A chemical change involving an exchange of positive ions between two compounds
What is a double replacement reaction?
AB + CD ---> AD + CB represents this type of reaction
What is a double replacement reaction?
A triangle above the yield sign indicates this is supplied to the reaction
What is heat?
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?
This metal is the most reactive metal on the activity series list
What is Lithium?
This is used to speed up chemical reactions by lowering activation energy
What is a catalyst?
The coefficient needed in front of the Silver nitrate needed 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 25?