Naming compounds and writing formulas

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Naming compounds and writing formulas

• Why do we name things?
• How do we name things?

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Why do we name stuff in chem?How do we do it?
Formula NaCI C.A.S. 7647-14-5 Molecular
weight 58.45Bulk Density 2.165 Appearance
White or clear solidOdor Odorless
www.science-education.org
http//www.fritzspecialty.com/chemicals/sodiumchlo
ride.htm
http//library.tedankara.k12.tr/chemistry/vol1/sal
ts/trans19.htm

• http//faculty.clintoncc.suny.edu/faculty/Michael.
  Gregory/files/Bio20101/Bio2010120Lectures/chemi
  stry/sodium_chloride.jpg

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Atoms elements

• Whats an atom?
• http//www.micromountain.com/sci_diagrams/at_struc
  t/at_struct_pages/canimorb.htm
• Whats an element?
• How are they the same?
• How are they different?

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x4.html
http//www.webelements.com/webelements/elements/te
xt/Mg/key.html
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molecules, compounds formula units

• These compounds exist as large clusters of ions.
• NaCl, KCl, Ba(NO3)2, MgSO4, AlF3
• Each unit is a formula unit.
• Whats the difference between a formula
• unit and a molecule?

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ngmaterials/bonding_higherrev2.shtml
http//sbchem.sunysb.edu/msl/nacl.html
http//encarta.msn.com/media_681500358/Glucose_Mol
ecule.html
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Molecules and compounds

• These are molecules.
• H2O, CO2, XeF6, C6H12O6
• What makes a molecule?
• Whats a compound?
• Can you have a molecule thats not compound?

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These are all ions.

• These are cations
• These are anions
• These are polyatomic ions
• What do all ions have in common?

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Remember electron configurations?

• What elements are shown in this picture? Whats
  going on?
• Why do elements
• form ions?
• Look here!

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mations/CHE1.3-an-atoms.shtml
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94-041102031104.jpg
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Valence, charge or oxidation numbertheyre
synonyms!

• Na
• Al3
• SO4-2 (also written as SO42-)
• Li
• O-2
• Cl-
• NO3-
• So whats an oxidation number or valence?

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These are all chemicals well write their
formulas

• Sodium chloride
• Potassium fluoride
• Magnesium hydroxide
• Lithium sulfate
• Aluminum oxide
• Iron III bromide
• ammonium carbonate
• When do you need roman numerals? Parentheses?

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Types of compounds

• Ionic compounds
• are made of?

• Covalent compounds AKA molecular compounds
• are made of?

• Metallic compounds exist, too!

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Naming molecular compounds (AKA binary compounds
of nonmetals) is easy!

• carbon dioxide
• carbon monoxide
• sulfur dioxide
• phosphorous pentachloride
• dinitrogen trioxide
• diphosphorous tetroxide
• Whats the pattern?
• The prefixes are on your Chem Helper!!!!
• Organics have their own system.later!

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Other ways to categorize compounds

• Binary compounds
• Ternary compounds
• Acids
• Bases

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Strong acids can be corrosive and dangerous

• hydrochloric acid
• hydrobromic acid
• hydroiodic acid
• sulfuric acid
• nitric acid
• phosphoric acid
• sulfurous acid
• nitrous acid

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Bases have a high pH

• NaOH
• LiOH
• Ba(OH)2
• Ca(OH)2
• NH3

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Well thats it, but.

• How will U know its a binary compound?!
• How will U know its an ionic compound?
• How will U know its an acid?
• How will U know its a base?
• Remember whats on your Chem Helper that can help
  U!