Upload
adanne
View
24
Download
1
Embed Size (px)
DESCRIPTION
Unit 2 Chemistry. Naming Compounds. Ionic bonds. What is an ionic bond? Quick rule: never use capital letters when writing names. Why name compounds?. So we know what is in products and what could be dangerous Compounds found at home = chemical names Bleach = sodium hypochlorite - PowerPoint PPT Presentation
Citation preview
Naming Compounds
Unit 2 Chemistry
Ionic bonds
What is an ionic bond?
Quick rule: never use capital letters when writing names
Why name compounds? So we know what is in products and what could be
dangerous Compounds found at home = chemical names
Bleach = sodium hypochlorite Baking soda = sodium bicarbonate Antifreeze = ethylene glycol Table salt = sodium chloride Vinegar = acetic acid Nail polish
remover = acetone
Glass cleaner = ammonia
Toothpaste = sodium fluoride
Ionic Bond naming
An ionic bond is between a metal and non-metal First write the cation (metal) first and do
not change the name at all Then write the anion (non-metal) second
but add the suffix –ide to the name Ex oxide, carbide, hydride, sulfide, chloride
Examples
NaCl- sodium chloride
LiBr- lithium bromide
K2O- potassium oxide
BeF2- beryillium flouride
Ionic bonds with polynomials
If there are more than two elements in the bond then one is a polynomial
The polynomial is almost always the anion except for NH4- ammonia
First write the metal name unchanged Next write the polynomial name
unchanged You find the names of polynomials from
the back of the table
Examples
NaOH- sodium hydroxide
CaCO3- calcium carbonate
MgNO3- magnesium nitrate
Easy right? some metals have more than one charge
making it more complicated Ex: Fe can have +3 or +2
Mn can have +2 or +4
V can have +5 or +4
When a metal has more than one charge you need to determine what the charge is: Ex iron and oxygen can be FeO or Fe2O3
Finding charges
Find what the negative charge is and then the positive charge has to be equal to that FeO- O is -2 so Fe has to be +2 Put the charge of the metal in roman
numerals right after the metal iron (II) oxide
Fe2O3- oxygen is -2*3= -6 so the cations add up to +6 Since there are 2 Fe, each one would be
+3 (+6/2) iron (III) oxide
CuCl- Cl=-1 so Cu must be +1 copper (I) chloride
Examples
V2O5- O=-2*5=-10 V= +10/2= +5
vandium (V) oxide