slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Chapter #7 Chemical Formulas and Chemical Compounds NearingZero PowerPoint Presentation
Download Presentation
Chapter #7 Chemical Formulas and Chemical Compounds NearingZero

Loading in 2 Seconds...

play fullscreen
1 / 19

Chapter #7 Chemical Formulas and Chemical Compounds NearingZero - PowerPoint PPT Presentation


  • 186 Views
  • Uploaded on

Chapter #7 Chemical Formulas and Chemical Compounds NearingZero.net. Section 1 Chemical Names and Formulas. Chemical Formulas C 6 H 12 O 6 Al 2 (SO 4 ) 3. Subscript indicates that there are 6 carbon atoms. Positive Ions Write the name of the element Write the word ion

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Chapter #7 Chemical Formulas and Chemical Compounds NearingZero' - agnes


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Chapter #7

Chemical Formulas and Chemical Compounds

NearingZero.net

section 1 chemical names and formulas
Section 1Chemical Names and Formulas
  • Chemical Formulas
  • C6H12O6 Al2(SO4)3

Subscript indicates that there are 6 carbon atoms

monatomic ions
Positive Ions

Write the name of the element

Write the word ion

Na+ = Sodiumion

Transition elements use Roman Numerals

Fe +2 = Iron(II)ion

Negative Ions

Write the name of the element

Change the ending to –ide

Write the word ion

Cl- = Chlorideion

Monatomic Ions
binary ionic compounds
Binary Ionic Compounds
  • 2 elements= Binary
  • Metal + nonmetal = ionic
  • Write the name of the 1st element
  • Write the name of the 2nd element
  • Change the ending to –ide
  • NaCl =Sodium Chloride
  • MgCl2 =MagnesiumChloride
stock system
Stock System
  • Uses roman numerals
  • Write the name of the 1st element
  • Write the oxidation number of the 1st element
  • Write the name of the 2nd element
  • Change the ending to –ide
  • CrF3 =Chromium(III)Flouride
  • NiF
binary molecular compounds
Binary Molecular Compounds
  • Molecular= covalent PG 212 Prefixes
  • Write the name of the 1st element
  • Write the name of the 2nd element
  • Change the ending to –ide
  • Put in prefixes
  • Only use prefixes on the 1stelement if it is more than 1

NO2= Nitrogen Dioxide

N2O3

binary acids
Binary Acids
  • Acids always begin with H
  • Acids that consist of 2 elements
  • Write hydro
  • Write the 2nd element
  • Change the ending to –ic
  • Write the word ACID
  • HF= Hydrofluoric Acid
  • HBr
oxyacids
Oxyacids
  • Are acids that contain hydrogen, oxygen, and a third element.
  • Never use Hydro
  • Write the name of the polyatomic(pg 210)
  • Change the ending to –ic or –ous (ate -ic & ite

–ous)

  • Write the word ACID
  • H2SO4 = sulfuric acid
  • H3PO4
polyatomic compounds
Polyatomic Compounds
  • Write the name of the 1st element
  • Write the name of the polyatomic (pg 210)
  • NaNO3 = SodiumNitrate
  • AgNO2
section 2 oxidation numbers
Section 2 Oxidation Numbers
  • Oxidation numbers- are assigned to the atoms in molecules, including molecular ions, to show the general distributions of electrons among the bonded atoms.

+1

+/-

4

+2

+3

-3

-2

-1

oxidation numbers
Oxidation numbers
  • Rules pg 216
  • UF6
  • UF6 criss cross the numbers up
  • Check the 2nd element using the periodic table
  • U= +6 F= -1
  • Polyatomic compounds do a math line

+3-8 =0 H= +1 P= 5 O=-2

+1-2

H3PO4

  • If there is an ION (charge) do a math line
practice oxidation numbers
Practice oxidation numbers
  • GeCl2
  • CS2
  • ClO3-
  • H2SO4
  • PCl3
  • HNO3
  • GeO
  • SO4-2
  • NO2-
section 3 using chemical formulas
Section 3 Using Chemical Formulas
  • Formula mass (molar mass or weight) of any compound or polyatomic ion is the sum of the average atomic masses of all the atoms represented in the formula.
  • H20 H x 2= 2.014g

O x 1 = 15.999g

18.013 g of H2O

old stuff
Old stuff
  • Mole to grams
  • Grams to moles
  • Moles to particles
  • Particles to moles
  • Grams to particles
  • Particles to grams
percent composition
Percent Composition

% comp= Mass of element in the sample

mass of sample (formula mass)

Calculate the % comp of H2O

X 100

section 4 determining chemical formulas
Section 4 Determining Chemical Formulas
  • Empirical Formula- (simplest formula) consists of the symbols for the elements combined in a compound, with subscripts showing the smallest whole-number mole ratio of the different atoms in the compound.
  • C2H6 simplest formula would be CH3
empirical formulas
Empirical Formulas
  • Drop the % signs and add grams
  • Covert to moles of each element
  • Take the smallest number of moles and divide it into all the other values
  • Write the formula

Determine the empirical formula for a sample that contains 78.1% B & 21.9% H

molecular formulas
Molecular Formulas
  • Do the same 4 steps for determining empirical formulas
  • Add up the formula mass of the empirical formula
  • Use the molecular formula mass in the question
  • Use the formula X= Molecular formula mass

empirical formula mass

  • Use the x and multiply your empirical formula using it
slide19
“Cartoon”. Aug. 11, 2006. http://www.nearingzero.net/sbunch5.html