This type of reaction is the simplest reaction, when two things combine together to make a larger compound
Generic: A + B → AB
COMBINATION REACTION
Which side of the arrow is showing the REACTANTS?
Left or Right? 
Left!!
Na + Cl2 → 2 NaCl
Its not balanced! It needs a 2 in front of Na
2 Na + Cl2 → 2 NaCl
What type of Compounds are found in double replacement reactions?
ionic compounds! (elements with different than normal charges!)
How do these elements form a balanced compound?
Mg
Br
MgBr2
This type of reaction happens when ONE element is swapped in a compound to create a different compound
Generic: AB + C → AC + B
SINGLE REPLACEMENT
A nonmetal and metal bond creates a __________ compound
An Ionic Bond!
2(PO4) + 3Ca → Ca3(PO4)2
Yes its balanced!
Name the Ionic compound (Hint: NO prefixes, just -ide)
MgBr2
Magnesium Bromide
How do these elements form a balanced compound?
HCl
HCl
This type of reaction is when one compound breaks down into two smaller elements
Generic: AB → A + B
DECOMPOSITION REACTION
What does it mean for a element to be diatomic?
(Hint: BrINClHOF)
They are too reactive alone so they always come in pairs!
2 KClO3 → 2 KCl + 3 O2
its balanced!
What do we call the strip of paper we use to test the pH of acids and Bases?
Litmus Paper
How do these elements form a balanced compound?
Na
(SO4)
Na2(SO4)
This reaction happens when a Hydrogen Ion is lost and gained. (HINT: It has a pH value!)
Generic: HCl + NaOH → NaCl + H2O
ACID BASE REACTION
This forms when a double replacement reaction creates an insoluble compound (a fancy way to say solid)
A precipitate
HCl + Zn → ZnCl2 + H2
Its NOT balanced! It needs a 2 in front of HCl
2 HCl + Zn → ZnCl2 + H2
How do you count the total atoms when you have a coefficient in front of a compound that has subscripts?
2 MgCl2
You MULTIPLY the coefficient to the subscripts
2 MgCl2 = 2 magnesiums and 4 chlorines
= 6 total atoms
How do these elements form a balanced compound?
(NH4)
(NO3)
NH4NO3
This reaction is when TWO elements swap places to create TWO new compounds
Generic: AB + CD → AD + CB
DOUBLE REPLACEMENT
If a chemical reaction obeys the Law of Conservation of Matter, it is said to be _______________ or the reactants equal the products
balanced
5 C + 2 SO2 → CS2 + CO
It is NOT balanced! There needs to be a 4 in front of CO
5 C + 2 SO2 → CS2 + 4 CO
Name this COVALENT compound: (Hint: use prefixes since its covalent)
B5H9
Pentaboron Nonahydride
How do these elements form a balanced compound?
Al
(CO3)
Al2(CO3)3