Chemistry—Guten tag! Please take out: Naming Grid Lab notebook HW sheet Ask your partner, “Are you going to dress up for Halloween tonight?”

Learning targets!!!!! I can correctly name and write formulas for ionic compounds I can correctly name and write formulas for molecules I can correctly name and write formulas for acids

Warm up Name the following compounds: Write the following formulas: Na C2H3O2 (NH4)2S FeO Fe2O3 Mg(OH)2 Sodium acetate Na2CO3 Sodium carbonate Lithium sulfate Magnesium chlorite Ammonium nitrate Sodium chloride Ammonium sulfide Li2SO4 Ferrous oxide or Iron (II) Oxide Mg(ClO2)2 Ferric oxide or Iron (III) Oxide #3 We know that O has a -2 charge so Fe must have a +2 charge which means it is ferrous or Iron (II). #4 You can flip flop the subscript, so we know Fe has a +3 charge and O has a -2 charge so the name would be Ferric or Iron (III). For Sodium carbonate…sodium has a +1 charge and carbonate has a -2 charge, so you need 2 sodium atoms with one carbonate to make a neutral atom. NH4NO3 Magnesium hydroxide NaCl

HW Review Check your answers with the key Give yourself a ½ point for every correct formula, and a ½ point for every correct name Give yourself a total (mentally) Record in your homework log and put away *Remember that your homework score is based on your “effort”!! If you attempted all boxes and feel good about hit give yourself a “10”!

Quiz Try your best, flip it over when finished. If you are finished, draw your best pumpkin, ghost or ghoul and a bat on the back.

Rules for Covalent naming 1. 1st Non-Metal normal 2. 2nd Non-Metal ends in –IDE Prefixes are used to show # of atoms Mono – 1, Di – 2, Tri – 3, Tetra – 4, Penta – 5, Hexa– 6 Mono is NEVER used with the 1st Non-Metal Ex: Carbon Dioxide = CO2, not monocarbon dioxide H₂O =dihydrogen monoxide or WATER! 1 is mono 2 is di 3 is tri 4 is tetra 5 is penta

Practice! Name it! CF4 NO2 NO Write the formula! Dicarbon difluoride Sulfur monoxide Phosphorus pentafluoride Check yourself… Carbon tetrafluoride Nitrogen dioxide (NOT MONONITROGEN!) Nitrogen monoxide …before you wreck yourself! C2F2 SO PF5

Naming Acids Acids are compounds that give off H+ ions when dissolved in water In high concentrations these ions can disrupt our cell membranes and “burn” us Contains Phosphoric Acid H3PO4

Acid Formulas and Naming Formulas always start with a Hydrogen Two types of Acids: 1) Does not contain oxygen Hydro ______ ic Acid (Blank= name of anion) Example: H+ and Br- so… HBr Hydrobromic Acid

Acid Formulas and Naming Notice you still have to make sure the compound is neutral! Cross the charges to make subscripts when writing the formula! H+ + S2- = H2S or Hydrosulfuric Acid H+ and N3- = H3N or Hydronitric Acid H+ and NO2- = HNO2 H+ and NO3- = HNO3

Acid Formulas and Naming Formulas always start with a Hydrogen 2) Does Contain Oxygen H+ + a polyatomic ion Don’t use hydro– , change the ending of the polyatomic ate becomes ic ite becomes ous Ex: H+ + SO42- (sulfate) = H2SO4 ate  ic Sulfuric Acid

I ATE big and got sICk, H2SO4 ate  ic Sulfuric Acid Take a bIte you little wOUS H2SO3 ite  ous Sulfurous Acid

Now You Try! Give the name: HCl HClO2 HClO3 Give formula: Phosphoric acid Hydrophosphoric Acid Hydrochloric Acid Chlorous Acid Chloric Acid H3PO4 H3P Make sure that you remember that the hydro has nothing to do with whether or not there is a hydrogen. All acids by definition have hydrogen. They hydro tells you whether or not the acid has an oxygen.

Non-written Exit task Mentally grade yourself on the learning targets I can correctly name and write formulas for ionic compounds I can correctly name and write formulas for molecules I can correctly name and write formulas for acids