section 4.1: naming binary compounds period 6 group #5
TRANSCRIPT
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