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# Naming binary compounds part ii

Published on: Mar 3, 2016
Published in: Education
Source: www.slideshare.net

#### Transcripts - Naming binary compounds part ii

• 1. Naming Binary Compounds Part II The Stock System
• 2. ObjectivesName simple binary compounds using theirformulae.Given the name, write the formula of a simplebinary compounds
• 3. The Stock SystemThe Stock System is used when the cation or thefirst part of the compound has more than onepossible charge.The charge of the cation/metal is denoted by aRoman Numeral.
• 4. Roman Numerals1=I2 = II3 = III4 = IV5=V6 = VI7 = VII
• 5. Special Case: Hg +1Hg+1 is never by itself.When you see it in a formula it will look like Hg2and have a +2 chargeExample: Hg2Cl2 is mercury(I) chlorideHowever, Hg+2 is mercury(II)Example HgCl2 is mercury(II) chloride
• 6. ExamplesIron has 2 possible charges Fe+2 & Fe+3They would be Fe (II) or Fe (III)Ions/metals that only have one charge there is noreason to use the Roman Numerals
• 7. ExamplesFe2O3 and FeOIn Fe2O3 the Iron has a +3 charge so the namewould be: Iron (III) OxideIn FeO the Iron has a +2 charge so the namewould be: Iron (II) Oxide
• 8. Try It Your SelfStep I: Determine the charge on the metalsusing the non metal part (ex. O and Cl)Step II: Write the correct name.Here are your problems: CuO and CuClNow pause the video and try them.
• 9. AnswersCopper (II) OxideCopper (I) Oxide
• 10. Next Up Naming Non­Metal  Binary CompoundsPrepare To Practice In ClassPrepare To Practice In Class