chp6 - Chapter 6 Chapter Nomenclature of Nomenclature...

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Unformatted text preview: Chapter 6 Chapter Nomenclature of Nomenclature Inorganic Compounds Inorganic Objectives: Distinguish between common and systematic names of Distinguish compounds compounds Review differences between elements and ions Be able to write formula from names of compounds Understand binary compounds Name compounds containing polyatomic ions Name and recognize acids Common and Systematic Names Common Common Names Arbitrary Not based on chemical composition Historically associated with a physical or chemical Historically property property Not consistent among languages or disciplines Systematic names Identify the chemical composition Devised by IUPAC Elements and Ions Elements Diatomic molecules Polyatomic Polyatomic 2 atoms of same element H2, O2, N2, F2, Cl2, Br2, I2 3 or more atoms of same element Sulfur (S8) and Phosphorus (P4) (P Ion Charged particle Charged Positive (cation) Negative (anion) Elements and Ions Elements Naming cations Naming anions Same as element but add the word ion Potassium ion Stem of the parent name with ending changed to – Stem ide Add the word ion Oxide ion Commonly formed ions – figure 6.2 pg 107 Writing Formulas from Names of Compounds Compounds Chemical compounds must have a net charge Chemical must of zero zero Compare charges of ions formed from Compare elements elements “Trade” charges and rewrite as subscript on Trade” opposite ion opposite Write with lowest possible whole numbers Writing Formulas from Names of Compounds Compounds Write formulas for Sodium and chlorine Na1+ Cl1­ NaCl Aluminum and oxygen Al3+ O2­ Al2O3 Writing Formulas from Names of Compounds Compounds Write formulas for the following Calcium chloride Calcium will form Ca2+ Chlorine will form Cl1 Formula is CaCl2 Formula CaCl Magnesium oxide Magnesium will form Mg2+ Oxygen will form O2 Formula is MgO Formula MgO Writing Formulas from Names of Compounds Compounds Barium phosphide Barium will form Ba2+ Phosphorus will form P3Formula is Ba3P2 Formula Ba Sodium sulfide Sodium will form Na+ Sulfur will form S2Formula is Na2S Formula Na Binary Compounds Binary Contain only two different elements Often metal with nonmetal (binary Often ionic compound) ionic Binary Ionic Compounds Containing a Metal Forming Only One Type of Cation Only Name of cation is left the same Name of anion is changed (-ide) Write formulas for the following compounds Strontium chloride Strontium is Sr2+ and Chlorine is Cl- SrCl2 Calcium sulfide Calcium is Ca2+ and Sulfur is S2- CaS Binary Ionic Compounds Containing a Metal That Can Form Two or More Types of Cations Types Metals in the center of the periodic table Iron can be Fe2+ or Fe3+ Stock System Use Roman Numeral to designate charge of cation Copper (II) Chloride is CuCl 2 Tin (IV) Oxide is SnO2 -ous and –ic endings are also sometimes used Binary Ionic Compounds Containing a Metal That Can Form Two or More Types of Cations Types Write the name for each of the following Write compounds compounds PbI2 Fe2O3 CuO TiF4 Lead (II) Iodide Iron (III) Oxide Copper (II) Oxide Titanium (IV) Fluoride Binary Compounds Containing Two Nonmetals Two Not ionic bonds - Molecular (covalent) Not Molecular Different system of naming Element that occurs first in the series below is Element written and named first written Si, B, P, H, C, S, I, Br, N, Cl, O, F Usually given to you…first element listed always Usually named first named Second element retains –ide ending Binary Compounds Containing Two Nonmetals Two Prefix is attached to each element to indicate the Prefix number of atoms of that element in the molecule number Mono (1) never used for first element Prefix Meaning Prefix Meaning Mono 1 Hexa 6 Di 2 Hepta 7 Tri 3 Octa 8 Tetra 4 Nona 9 Penta 5 Deca 10 Binary Compounds Containing Two Nonmetals Two Examples: N2O is dinitrogen monoxide (drop “o”) S2F10 is disulfur decofluoride You try: P2O5 Diphosphorus pentoxide CBr4 Carbon tetrabromide NH3 Nitrogen trihydride Acids Derived from Binary Compounds Compounds Hydrogen compounds – form acids in water Write symbol of H first, then the rest Shows it is an acid Naming Take stem of nonmetal Add prefix hydroAdd hydroAdd suffix –ic Add –ic Add the word acid Add acid Acids Derived from Binary Compounds Compounds H2S Hydrogen sulfide (if not in water) Hydrosulfuric acid HCl Hydrogen chloride (if not in water) Hydrochloric acid Figure 6.4 on page 115 VERY HELPFUL FOR NAMING BINARY VERY COMPOUNDS COMPOUNDS Naming Compounds Containing Naming Polyatomic Ions Polyatomic ion Must be able to recognize common polyatomic Must ions ions Table 6.6 (pg 116) Naming Compounds Containing Naming Polyatomic Ions Usually end in –ate or –ite (but not always) ClO- hypochlorite -ate indicates -ite indicates Nitrate is NO3Nitrite is NO2- Hypo (if more than two varieties) ClO2- chlorite ClO3- chlorate ClO4hyperchlorate or perchlorate Naming Compounds Containing Naming Polyatomic Ions Need to recognize polyatomic ions in Table 6.6 Hydroxide (OH-) Cyanide (CN-) Naming Compounds Containing Naming Polyatomic Ions Naming follows binary compound rules Naming Acids Naming Oxy-acids Inorganic compounds containing hydrogen, Inorganic oxygen, and one other element oxygen, Change ending of polyatomic ion HC H O 232 Add the word “acid” Hydrogen & acetate ion Acetic acid Homework Homework Questions #1,3,6 Paired Exercises #7-25 odd Additional Exercise #34 & 36 Remember: Quiz next class Remember: ...
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This note was uploaded on 11/11/2011 for the course RHE 44990 taught by Professor Rayburn during the Spring '08 term at University of Texas at Austin.

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