Formulas for ionic compounds
This presentation is the property of its rightful owner.
Sponsored Links
1 / 9

Formulas for ionic compounds PowerPoint PPT Presentation


  • 70 Views
  • Uploaded on
  • Presentation posted in: General

Formulas for ionic compounds. Chemical names. The International Union of Pure and Applied Chemistry (IUPAC) names compounds Chemical names always have two parts: one for each type of ion in it. Salt (Sodium Chloride) is made from a positive sodium ion and a negative chlorine ion.

Download Presentation

Formulas for ionic compounds

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


Formulas for ionic compounds

Formulas for ionic compounds


Chemical names

Chemical names

  • The International Union of Pure and Applied Chemistry (IUPAC) names compounds

  • Chemical names always have two parts: one for each type of ion in it.

  • Salt (Sodium Chloride) is made from a positive sodium ion and a negative chlorine ion.

  • The positive metal gets listed first in the name

  • The negative non metal ion has its ending changed to “ide” (chlorine become chloride)


How to write ionic compound names

How to write Ionic compound names

  • Name the metal ion

  • Name the non-metal ion (end in “ide”)

  • Write the name of the compound

    Ex: MgBr2 is made from the metal magnesium and the non-metal bromine

    It gets named magnesium bromide


Chemical formula

Chemical formula

  • The chemical formula of an ionic compound contains symbols to identify each ion

  • The chemical formula also shows the relative numbers of ions in the compound

    Ex: sodium chloride NaCl (one Na and one Cl)

    Ex: calcium flouride CaF2 (one Ca, two F)

    Ex: aluminium oxide Al2O3 (two Al, three O)


Rules for writing formulas

Rules for writing formulas

  • Positive and negative ions must balance out (be equal in number)

  • The final formula must equal the smallest whole number ratio (remember math class?)

    Steps:

  • Identify the charge of each ion

  • Determine total charges needed to balance

  • Note the ratio of positive ot negative ions

  • Use “subscripts” to write the formula (do not write the # 1)


Example zinc nitride

Example: zinc nitride

  • Zinc: Zn2+ and Nitride N3-

  • Zn 2+ : +2, +2, +2 = +6

    N3- : -3, -3 = -6

  • 3 Zn2+ ions needed for every 2 N3- ions (3:2)

  • Zn3N2


Now you try with aluminium chloride

Now you try with: aluminium chloride

  • Aluminium is AL3+ chloride is Cl-

  • Al3+ : +3 = +3

    Cl - : -1, -1, -1 = - 3

  • 1 Al3+ ions needed for every 3 Cl- ions (1 :3)

  • AlCl3


Do practice problems on pg s 86 and 87

Do “Practice Problems” on pg's 86 and 87

Now for some work:


  • Login