Chapter 9
Nomenclature
(naming stuff)
Seriously?!
Chemical what?!

Chemical Reactions are
cool!
A new substance with a new
property will be made!
Monoatomic Ions

 Mono means one.

 When the metals in groups 1A, 2A and 3A lose

electrons, they form cations with posi...
Ions of Transition Metals

 The metals of groups 1B-8B form more

than one cation with different charges.
 The charges o...
Polyatomic Ions

 Some ions, called polyatomic ions, are

composed of more than one atom.
 The names of polyatomic ions ...
Let’s Practice!

 Write the name for the following:

Ca+2
Fe+2
Cu+1
Li2C03
NH4+
NO3BrNH4NO3

I’M READY!!
ANSWERS!

 Write the name for the following:

Ca+2

Li2C03

calcium ion
iron(II) ion
copper(I) ion
lithium carbonate

...
HIGH FIVE!
Name the following:

NaClO4

HCN

NH4H2PO4

SUM IT UP!
Writing Formulas for Ionic
Compounds
 A binary compound is composed of two

elements and can be either ionic or molecular...
Balancing Charges Using the
Crossdown Method
 Write the cation first with its charge.
 Then write the anion with its cha...
Let’s Practice!
 Write the formulas for the following binary

compounds.
 Barium sulfide
 Calcium nitride
 Lithium oxi...
ANSWERS!!
 Write the formulas for the following binary

compounds.
 Barium sulfide
 Calcium nitride
 Lithium oxide

 ...
Compounds with Polyatomic Ions

 Write the symbol and charge for the

cation.
 Write the polyatomic formula and the
char...
Let’s Practice!
 Write the formulas for the following:
 Calcium nitrate
 Sodium carbonate
 Calcium phosphate
ANSWERS!
 Write the formulas for the following:
 Calcium nitrate
 Sodium carbonate
 Calcium phosphate

Ca(NO 3)2
Na2CO...
Hey wait! I think I
got those problems
right!
SUM IT UP!

Write the formula for:
Potassium sulfide

Calcium carbonate
Naming and Writing Formulas for
Covalent (Molecular) Compounds
 The prefix in the name of the binary compound

tells how ...
LET’S PRACTICE!

 Write the names/formulas of the following

compounds.

CS2
Cl2O7
NI3
Carbon tetrabromide
Diphospho...
ANSWERS

 Write the names/formulas of the following

compounds.

CS2
Cl2O7
NI3

carbon disulfide
dichloride heptaoxide...
Naming and Writing Formulas for
Acids
 An acid is a compound that contains one or

more hydrogen atoms and produces hydro...
LET’S PRACTICE!

 Write the name/formula for the following

acids:
 HBr
 H2SO4

 Hydrochloric acid
 Carbonic acid
 H...
The Laws of Definite and Multiple
Proportions
 The law of definite proportions states that in any

sample of a chemical c...
SUM IT UP!

What is
the name
for HNO3 ?
Word Equations
 Symbols to remember:

means yield or produces or makes, it’s like
an =sign in math
 + means add the comp...
LET’S PRACTICE!
 1.

Hydrogen gas and oxygen gas
combine to form liquid water.
 2. Methane gas (CH4) and oxygen gas
comb...
ANSWERS


H2(g) + O2(g)  H2O(l)

 CH4(g) + O2(g)  CO2(g) + H2O(l)
 (NH4)2CO3(s) + Ca(NO3)2

(aq) + CaCO3 (s)

(aq)  ...
OMG, I’M FINALLY DONE!
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
Chapter 9 notes-Chemistry
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Chapter 9 notes-Chemistry

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Chapter 9 notes-Chemistry

  1. 1. Chapter 9 Nomenclature (naming stuff)
  2. 2. Seriously?! Chemical what?! Chemical Reactions are cool! A new substance with a new property will be made!
  3. 3. Monoatomic Ions  Mono means one.  When the metals in groups 1A, 2A and 3A lose electrons, they form cations with positive charges equal to their group number.  They keep their names and just put the word “ion” after it.  Nonmetals tend to gain electrons to form anions.  The charge of any anion is determined by subtracting 8 from their group number.  Elements in group 7A have a -1 charge and so on.  Their names will have the ending –ide.  For example, oxide, nitride, phosphide….etc
  4. 4. Ions of Transition Metals  The metals of groups 1B-8B form more than one cation with different charges.  The charges of the cations of many transition metal ions must be determined from the number of electrons lost.  To name these ions, a Roman numeral is used in parentheses after the name of the element.  For example, Fe+3 would be called iron(III).
  5. 5. Polyatomic Ions  Some ions, called polyatomic ions, are composed of more than one atom.  The names of polyatomic ions end in –ite or –ate.  There are three other ions that have different endings cyanide, ammonium and hydroxide  All ions with oxygen in them end with an – ite or an –ate.  Refer to your polyatomic table for the names and charges.
  6. 6. Let’s Practice!  Write the name for the following: Ca+2 Fe+2 Cu+1 Li2C03 NH4+ NO3BrNH4NO3 I’M READY!!
  7. 7. ANSWERS!  Write the name for the following: Ca+2 Li2C03 calcium ion iron(II) ion copper(I) ion lithium carbonate NH4+ ammonium ion Fe+2 Cu+1 NO3- nitrate ion Br- bromide ion ammonium nitrate NH4NO3
  8. 8. HIGH FIVE!
  9. 9. Name the following: NaClO4 HCN NH4H2PO4 SUM IT UP!
  10. 10. Writing Formulas for Ionic Compounds  A binary compound is composed of two elements and can be either ionic or molecular.  To name any binary ionic compound, place the cation first and then the anion name.  To write a formula for a binary compound, write the symbol of the cation and then the anion.  Add whatever subscripts are needed to balance the charges.  BALANCING THE CHARGES IS IMPORTANT!!!!
  11. 11. Balancing Charges Using the Crossdown Method  Write the cation first with its charge.  Then write the anion with its charge.  The charge of one ion becomes the subscript for the other ion.  You “cross” them down.  If the charges match, then no numbers are needed.  Remember, each compound wants to have a net charge of zero.
  12. 12. Let’s Practice!  Write the formulas for the following binary compounds.  Barium sulfide  Calcium nitride  Lithium oxide  Copper(II) iodide  Iron(III) oxide
  13. 13. ANSWERS!!  Write the formulas for the following binary compounds.  Barium sulfide  Calcium nitride  Lithium oxide  Copper(II) iodide  Iron(III) oxide BaS Ca3N2 Li2O CuI2 Fe 2O3
  14. 14. Compounds with Polyatomic Ions  Write the symbol and charge for the cation.  Write the polyatomic formula and the charge.  Cross down the charges.  Remember, they must balance to zero.  Pretend the polyatomic ion is one atom.  If more than one polyatomic ion is needed, put parentheses around the polyatomic formula.
  15. 15. Let’s Practice!  Write the formulas for the following:  Calcium nitrate  Sodium carbonate  Calcium phosphate
  16. 16. ANSWERS!  Write the formulas for the following:  Calcium nitrate  Sodium carbonate  Calcium phosphate Ca(NO 3)2 Na2CO3 Ca3(PO4)2
  17. 17. Hey wait! I think I got those problems right!
  18. 18. SUM IT UP! Write the formula for: Potassium sulfide Calcium carbonate
  19. 19. Naming and Writing Formulas for Covalent (Molecular) Compounds  The prefix in the name of the binary compound tells how many atoms of each element are present in the molecule. (see table 9.4)  The suffix for all the compounds is –ide.  Use the prefixes in the name to tell you the subscript of each element in the formula.  Write the correct symbols and the appropriate subscripts.
  20. 20. LET’S PRACTICE!  Write the names/formulas of the following compounds. CS2 Cl2O7 NI3 Carbon tetrabromide Diphosphorus trioxide
  21. 21. ANSWERS  Write the names/formulas of the following compounds. CS2 Cl2O7 NI3 carbon disulfide dichloride heptaoxide nitrogen triiodide Carbon tetrabromide CBr4 Diphosphorus trioxide P2O3
  22. 22. Naming and Writing Formulas for Acids  An acid is a compound that contains one or more hydrogen atoms and produces hydrogen ions when dissolved in water.  When the name of the anion ends in –ide, the acid name begins with the prefix hydro- and has the suffix –ic and ends in acid.  When the anion name ends in –ite the acid name ends in –ous followed by acid.  When the anion name ends in –ate, the acid name ends in –ic followed by acid.
  23. 23. LET’S PRACTICE!  Write the name/formula for the following acids:  HBr  H2SO4  Hydrochloric acid  Carbonic acid  HNO2 If you don’t get this right….I’m coming for your SOUL!
  24. 24. The Laws of Definite and Multiple Proportions  The law of definite proportions states that in any sample of a chemical compound, the masses of the elements are always in the same proportions.  They will always combine in simple wholenumber ratios.  The law of multiple proportions states that whenever two elements form more than one compound, they will be in simple whole number ratios.
  25. 25. SUM IT UP! What is the name for HNO3 ?
  26. 26. Word Equations  Symbols to remember: means yield or produces or makes, it’s like an =sign in math  + means add the compounds together  A triangle above the arrow, means heat is added.  (s) means solid or precipitate, (aq) means aqueous or dissolved in water, (g) means gas, (l) means liquid.  Reactants must equal the products. No random compounds!! 
  27. 27. LET’S PRACTICE!  1. Hydrogen gas and oxygen gas combine to form liquid water.  2. Methane gas (CH4) and oxygen gas combine to form carbon dioxide gas and liquid water.  3. Solid Ammonium carbonate and dissolved calcium nitrate are mixed together. Dissolved Ammonium nitrate and solid calcium carbonate are made.
  28. 28. ANSWERS  H2(g) + O2(g)  H2O(l)  CH4(g) + O2(g)  CO2(g) + H2O(l)  (NH4)2CO3(s) + Ca(NO3)2 (aq) + CaCO3 (s) (aq)  NH4NO3
  29. 29. OMG, I’M FINALLY DONE!

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