2.7 Naming compounds (Part 2 acids).pptx

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1. Lesson 2 : Naming Molecules Naming Acids Module 7

2. An acid can be defined as a substance that yields hydrogen ions (H + ) when dissolved in water. Example: HCl (hydrogen ion and chloride ion) Pure substance, hydrogen chlor ide Dissolved in water (H + Cl - ), hydro chlor ic acid 2.7 3) Naming acids Acids are divided into two categories when named: 1. Hydrogen + monoatomic ion (negatively charged)

3. An oxoacid is an acid that contains hydrogen, oxygen, and another element. H NO 3 Nitr ate ion nitr ic acid H 2 CO 3 Carbon ate ion carbon ic acid H 2 SO 4 Sulf ate ion sulfur ic acid HNO 3 Acids are divided into two categories when named: 2. Oxoacids (Hydrogen + polyatomic ion) Polyatomic ions Ends with -ate Ends with - ite Acids with polyatomic ions that ends with -ate

4. Common Polyatomic Ions Ion Name Ion Name NH 4  ammonium IO 4  periodate NO 2  nitrite C 2 H 3 O 2  acetate NO 3  nitrate H 2 PO 4  dihydrogen phosphate HSO 4  hydrogen sulfate CO 3 2  carbonate OH  hydroxide SO 3 2  sulfite CN  cyanide SO 4 2  sulfate MnO 4  permanganate S 2 O 3 2  thiosulfate HCO 3  hydrogen carbonate O 2 2  peroxide ClO  hypochlorite CrO 4 2  chromate ClO 2  chlorite Cr 2 O 7 2  dichromate ClO 3  chlorate HPO 4 2  hydrogen phosphate ClO 4  perchlorate PO 3 3  phosphite BrO 3  bromate PO 4 3  phosphate IO 3  iodate AsO 4 3  Arsenate Polyatomic ions (memorize these !!)

5. H NO 2 Nitr ite ion nitr ous acid Acids with polyatomic ions that ends with - ite

6. Practice: HI: HF: HNO 2 : HNO 3 : H 3 PO 3 : H 3 PO 4 : Naming acids:

7. A base can be defined as a substance that yields hydroxide ions (OH - ) when dissolved in water. Hydroxides of metals are bases. NaOH sodium hydroxide KOH potassium hydroxide Ba(OH) 2 barium hydroxide 4) Naming bases

8. 2.7 Some compounds are better known by their common names than by their systematic chemical names. Familiar examples are listed here.

9. A B C D Section Assessment Give the binary molecular name for water (H 2 O). A. dihydrogen oxide B. dihydroxide C. hydrogen monoxide D. dihydrogen monoxide

10. A B C D Section Assessment Give the name for the molecule HClO 4 . A. perchloric acid B. chloric acid C. chlorous acid D. hydrochloric acid

11. Dinitrogen monoxide Potassium sulfide Copper (II) nitrate Dichlorine heptoxide Chromium (III) sulfate Ferric sulfite Calcium oxide Barium carbonate Iodine monochloride N 2 O K 2 S Cu(NO 3 ) 2 Cl 2 O 7 Cr 2 (SO 4 ) 3 Fe 2 (SO 3 ) 3 CaO BaCO 3 ICl Mixed Practice

12. Mixed Practice BaI 2 P 4 S 3 Ca(OH) 2 FeCO 3 I 2 O 5 Cu(ClO 4 ) 2 CS 2 B 2 Cl 4 Barium iodide Tetraphosphorus trisulfide Calcium hydroxide Iron (II) carbonate Diiodine pentoxide Cupric perchlorate Carbon disulfide Diboron tetrachloride