### Present Remotely

Send the link below via email or IM

• Invited audience members will follow you as you navigate and present
• People invited to a presentation do not need a Prezi account
• This link expires 10 minutes after you close the presentation

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

# Naming Ionic Compounds

Teaches students how to name ionic compounds given the formula and how to write the formula given the name
by

## Melissa Betz

on 18 July 2013

Report abuse

#### Transcript of Naming Ionic Compounds

Writing Names From Formulas
The goal of this section is that given a formula, you will be able to write the name of the compound
Naming Ionic Compounds: Background Knowledge
Before we can begin with the lesson you need to understand a few concepts.

1. Ionic compounds involve a metal and a non-metal
2. The metal is a cation (positive charge)
3. The non-metal is an anion (negative charge)

4. There are many common polyatomic ions, having those memorized will prove useful here
Writing a Formula from a Name
Let's See Some Examples!
Unit5.2 Naming Ionic Compounds

Common
Polyatomic Ions
Step 1: Identify the Cation and Anion

Step 2: Write the names of the ions next to each other, cation first and changing the ending of the anion to -ide.

Step 3: If you have a transition metal or Sn, Pb, Bi, your next step is to check the charge. If you do not have a
transition metal, you're done!

Step 4: Check the charge in the cation and
write it as a roman numeral after
the name of the cation.

Now you are ready to work backwards!
Lets take a look at how to write a formula given the name of an ionic compound

Step 1: Identify the Cation and Anion

Step 2: Write the symbols for each (note: put any polyatomic ions in parentheses)

Step 3: Check the charge. (This comes from the periodic table or the roman numerals for transition metals)

Step 4: Criss-Cross the charges to make the subscripts for each ion

Example 1:
Example 2:
Magnesium Phosphate
Step 1: cation is Mg
anion is PO
4
Step 2: Mg (PO )
Step 3: Mg (PO )
4
magnesium has a +2 charge (from the periodic table)
and Phosphate has a -3 charge from the polyatomic chart
4
+2
-3
Step 4: criss-cross charges as subscripts
Mg (PO )
3 4 2
Example 3:
Sodium Sulfide
Sodium: Na which has a +1 charge
Sulfide: Sulfur, S, which has a -2 charge
Total cation charge is 1, while total
anion charge is -2 so we need 2 sodium
atoms to even out the charge
Na S
2
Example 4:
Lead = Pb Hydroxide = (OH)
Charge on Pb = +3 Charge on (OH) = -1
to get positive and negative charges to match, we need 3 hydroxide ions
Pb(OH)
3
Time to give it a go!
5. You should also have a working knowledge of determining common ion charges from the
periodic table (learned in unit 2)
Full transcript