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Chapter 4.2 Naming Compounds. Naming Ionic Compounds. Before you name it, you have to know when you see it! What is an Ionic Compound? How to identify an Ionic Compound?. Naming Ionic Compounds. What is an Ionic Compound? How to identify an Ionic Compound?

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naming ionic compounds
Naming Ionic Compounds

Before you name it, you have to know when you see it!

What is an Ionic Compound?

How to identify an Ionic Compound?

naming ionic compounds3
Naming Ionic Compounds

What is an Ionic Compound?

How to identify an Ionic Compound?

Metal and non-metal bonded together

Positive and negative ions

IONs and IONic compound

ionic or covalent compound
Ionic or Covalent Compound?

1. NaCl

2. CH4

3. S5Br18

4. MgO

5. NO

naming ionic compounds copy
Naming Ionic Compounds (copy)

Metal ion = name stays the same

Non-metal ion = change the ending to "-ide"

Example:

NaCl = Sodium Chloride

Na = Sodium

Cl = Chlorine >>> change ending to chloride

naming ionic compounds6
Naming Ionic Compounds

Examples:

1. Li3N

2. CaO

3. ZnS

4. AlP

naming ionic compounds7
Naming Ionic Compounds

Examples:

1. Li3N = Lithium Nitride

2. CaO = Calcium Oxide

3. ZnS = Zinc Sulphide

4. AlP = Aluminum Phosphide

chemical names to formulas
Chemical Names to Formulas

Write the chemical formula of Potassium Iodide.

Find the charge of each ion

Potassium ion = K+1

Iodine ion = I-1

The ratio is 1 to 1, so the formula is KI

chemical names to formulas9
Chemical Names to Formulas

Write the chemical formula of Potassium Oxide.

Find the charge of each ion

Potassium ion = K+1

Oxygen ion = O-2

The ratio is 1 to 2, so there must be 2 K for each O = K2O

OR cross the charges down

chemical names to formulas10
Chemical Names to Formulas

Write the chemical formula for Aluminum Nitride.

Find the charge of each ion.

Aluminum ion = Al+3

Nitrogen ion = N-3

Ratio is 3 to 3, or Al3N3     Reduce like a fraction.

AlN

practice problems
Practice Problems

Textbook

Page 187 - formula to names

Page 188 - names to formula

multivalent metal ionic compounds
Multivalent Metal Ionic Compounds

Multivalent

- Multi means more than one

- Valent refers to the valence electrons

So multivalent metals are metals with more than one charge.

Example: Copper, Cu (#29)

It can be Cu+1 or Cu +2 . Need to know which one!

multivalent metal ionic compounds13
Multivalent Metal Ionic Compounds

Write the chemical formula for:

1. Copper (I) fluoride

2. Copper (II) fluoride

3. Copper (II) nitride

4. Copper (II) oxide

multivalent metal ionic compounds14
Multivalent Metal Ionic Compounds

Write the chemical formula for:

1. Copper (I) fluoride = CuF

2. Copper (II) fluoride = CuF2

3. Copper (II) nitride = Cu3N2

4. Copper (II) oxide = CuO

multivalent metal ionic compounds15
Multivalent Metal Ionic Compounds

Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)

in the chemical name.

Examples:

Write the chemical name of:

1. CuF

2. CuCl2

3. PbO

4. PbO2

multivalent metal ionic compounds16
Multivalent Metal Ionic Compounds

Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)

in the chemical name.

Examples:

Write the chemical name of:

1. CuF = Copper (I) Fluoride

2. CuCl2 = Copper (II) Chloride

3. PbO = Lead (II) Oxide

4. PbO2 = Lead (IV) Oxide

polyatomic ions
Polyatomic Ions

Poly = many

atomic = atoms

Polyatomic Ions = ions with many different atoms. They stick together, treat them as one thing.

Look in the table for the name and formula.

Example: Sodium Nitrate = NaNO3

Sodium ion = Na+

Nitrate ion = NO3-

polyatomic ions18
Polyatomic Ions

Use brackets to show how many polyatomic ions.

Example: Zinc Hydroxide

Zinc ion = Zn+2

Hydroxide ion = OH-1

Zn(OH)2

polyatomic ions19
Polyatomic Ions

Examples

Write the name of:

1. LiCH3COO

2. Mg3(PO3)2

3. CrSO4

Write the formula of:

4. Calcium Perchlorate

5. Lead (IV) Chromate

6. Ammonium Sulfite

polyatomic ions20
Polyatomic Ions

Examples

Write the name of:

1. LiCH3COO = Lithium Acetate

2. Mg3(PO3)2 = Magnesium Phosphite

3. CrSO4 = Chromium (II) Sulfate

Write the formula of:

4. Calcium Perchlorate = Ca(ClO4)2

5. Lead (IV) Chromate = Pb(CrO4)2

6. Ammonium Sulfite = (NH4)2SO3

polyatomic ions21
Polyatomic Ions

Practice Problems

Textbook

Page 193

naming covalent compounds
Naming Covalent Compounds

Check that it IS a covalent compound first!

Two non-metals

Recall: Ionic or Covalent Compound?

1. NaCl

2. CH4

3. S5Br18

4. MgO

5. NO

naming covalent compounds23
Naming Covalent Compounds

Use a prefix to show how many of each element

First element - name stays the same. Only add a prefix if there is more than one.

Second element - change the ending to "-ide"

Example: CO2 = Carbon dioxide

naming covalent compounds24
Naming Covalent Compounds

Prefixes

1    mono

2    di

3    tri

4    tetra

5    penta

6    hexa

7    hepta

8    octa

9    nona                10   deca

naming covalent compounds25
Naming Covalent Compounds

Examples

Write the name of:

1. P2Br3

2. SO4

3. F5O10

Write the formula of:

1. dicarbon trinitride

2. hexaoxygen heptaiodide

3. octabromine monohydride

naming covalent compounds26
Naming Covalent Compounds

Write the name of:

1. P2Br3 = diphosphorous tribromide

2. SO4 = sulfur tetraoxide

3. F5O10 = pentafluorine decaoxide

Write the formula of:

1. dicarbon trinitride = C2N3

2. hexaoxygen heptaiodide = O6I7

3. octabromine monohydride = Br8H

naming covalent compounds27
Naming Covalent Compounds

Practice Problems

Textbook Pg 195

diatomic elements
Diatomic Elements

H2 = hydrogen

N2 = nitrogen

O2 = oxygen

F2 = fluorine

Cl2 = chlorine

Br2 = bromine

I2 = iodine

common mistakes
Common Mistakes

Be careful:

Sulfide = S-2          Sulfate = SO4-2       Sulfite = SO3-2

Sulfur tetraoxide = SO4         Sulfur trioxide = SO3

Nitride = N-3            Nitrate = NO3-2            Nitrite = NO2-1

Nitrogen dioxide = NO2              Nitrogen trioxide = NO3

naming everything
Naming Everything

Ionic, Covalent, Multivalent, Polyatomic will all be mixed together. You need to tell them apart to name them.

Practice Problems

Textbook Page 197, 201