section 4.1: naming binary compounds period 6 group #5

Section 4.1: Naming Section 4.1: Naming Binary CompoundsBinary Compounds

Period 6Period 6

Group #5Group #5

HOW DO YOU NAME THE HOW DO YOU NAME THE COMPOUND PCLCOMPOUND PCL55??

Naming Compounds That Contain Naming Compounds That Contain a Metal and a Nonmetal a Metal and a Nonmetal

Metals lose electrons to form cations, Metals lose electrons to form cations, nonmetals gain electrons to form anionsnonmetals gain electrons to form anions

A binary ionic compounds contains a A binary ionic compounds contains a cation, written first, then an anioncation, written first, then an anion

Two types of binary compounds:Two types of binary compounds:• Type I: the metal present forms only one type Type I: the metal present forms only one type

of cationof cation• Type II: the metal present forms two or more Type II: the metal present forms two or more

cations with different chargescations with different charges

What is written first in a What is written first in a binary ionic compound, the binary ionic compound, the

cation or the anion?cation or the anion?

Cation

COMPOUND CHART

Type 1 Binary Ionic compound • The cation is named first.

• Simple cations get their names for elements.

• Simple anion’s name has the element’s name with –ide at the end.

• You can write the name of the compound by combining the name of the ions.

Compounds Ions Name

Na,Cl Na+,Cl- Sodium Chloride

KI K+,I- Potassium iodide

CaS Ca^2+,S^2- Calcium Sulfide

CsBr Cs+,Br- Cesium Brodide

TYPE I COMPOUND

How do you name CaO?             

-Calcium Oxide

Type II binary Ionic CompoundsType II binary Ionic Compounds

Metal present can form two (or more) cation Metal present can form two (or more) cation with different charges with different charges

Most metals can form more than one type of Most metals can form more than one type of cationcation

            ex:) Cr ->  Cr2+ or Cr3+ex:) Cr ->  Cr2+ or Cr3+ Uses Roman numerals to specify the charge on Uses Roman numerals to specify the charge on

the cationthe cation --Transition metals are Transition metals are almost alwaysalmost always Type II Type II

Common Type II CationsCommon Type II Cations        Ion (Numbers are Ion (Numbers are

exponents)exponents)Systematic Name Systematic Name               Older NameOlder Name

Fe^3+Fe^3+ iron(III)iron(III) ferricferric

Fe^2+Fe^2+ iron (II)iron (II) ferrousferrous

Cu^2+Cu^2+ copper(II)copper(II) cupriccupric

Cu+Cu+ copper(I)copper(I) cuprouscuprous

Co^3+Co^3+ cobalt(III)cobalt(III) cobalticcobaltic

Co^2+Co^2+ cobalt(II)cobalt(II) cobaltouscobaltous

Sn^4+Sn^4+ tin(IV)tin(IV) stannicstannic

Sn^2+Sn^2+ tin(II)tin(II) stannousstannous

Pb^4+Pb^4+ lead(IV)lead(IV) plumbicplumbic

Pb^2+Pb^2+ lead(II)lead(II) plumbousplumbous

Hg^2+Hg^2+ mercury(II)mercury(II) mercuricmercuric

Hg2^2+*Hg2^2+* mercury(I)mercury(I) mercurousmercurous

Which charge does Iron(II) Chloride refer to?

2+ for Iron.

What is the Roman numeral for?

-The Roman numerals are used to specify the charge on the cation.

Naming Binary Compounds Naming Binary Compounds That Contain Only Nonmetals That Contain Only Nonmetals (Type III)(Type III)

First element in the formula is named first, First element in the formula is named first, using the full element nameusing the full element name

The second element is named like an anionThe second element is named like an anion Prefixes are used to denote the # of atoms Prefixes are used to denote the # of atoms

presentpresent The prefix mono- is never used for naming the first The prefix mono- is never used for naming the first

elementelement Drop the final o or a of the prefix when second Drop the final o or a of the prefix when second

element is oxygenelement is oxygen Ex: OEx: O11 monooxide monooxide monoxide monoxide

How do you How do you name ICl3?name ICl3?

-Iodine -Iodine trichloridetrichloride

Common Names

-Some compounds referred to common names Ex: water (H2O), Ammonia (NH3)

These names cannot be name in any way.

They can only be memorized.

Common Anion Chart

Quiz

1. What is the suffix of the ion with the lower charge in the older system of naming?

2. Knowing that N2O5 does not have a common name, how would you name it using the Type III system?

3. What do we call a compound that contains a cation and an anion?

4. What type of metal is specific to Type II system?

5. What is the difference between Type I and Type II compounds?

Answers

1. The suffix is –ous.

2. Dinitrogen pentoxide

3. Binary ionic compound

4. Transition Metals

5. The metals in Type I has one charge while the metals in Type II can have two more charges.

References References http://images.absoluteastronomy.com/images/http://images.absoluteastronomy.com/images/

topicimages/i/ir/iron%28iii%29_chloride.giftopicimages/i/ir/iron%28iii%29_chloride.gif http://www.iun.edu/~cpanhd/C101webnotes/http://www.iun.edu/~cpanhd/C101webnotes/

composition/images/ionform2.jpgcomposition/images/ionform2.jpg http://www.miracosta.edu/home/dlr/naming.htmhttp://www.miracosta.edu/home/dlr/naming.htm   http://www.chemguide.co.uk/atoms/bonding/pcl5.GIFhttp://www.chemguide.co.uk/atoms/bonding/pcl5.GIF   http://images.asia.ru/img/alibaba/photo/50243277/http://images.asia.ru/img/alibaba/photo/50243277/

Calcium_Oxide.jpgCalcium_Oxide.jpg http://www.chem.ufl.edu/~itl/2045_s99/matter/http://www.chem.ufl.edu/~itl/2045_s99/matter/

TB02_005.GIFTB02_005.GIF