Unit 5 Naming Compounds / Writing Formulas / Mole Math .

Unit 5Naming Compounds / Writing Formulas / Mole Math / % Composition / Empirical & Molecular FormulasYou Need –ChromebookWhite BoardMarkerPaper towelReferenceTables

Unit 5 TopicsCHEMICAL NOMENCLATURE / FORMULA WRITINGMOLE MATH% COMPOSITIONEMPIRICAL & MOLECULAR FORMULAS

Today’s Objective Apply knowledge of ion charges to determine thechemical formulas of ionic compounds. Binary Compounds Compounds with Polyatomic Ions(p. 7 Ref Tables) Compounds with Transition Metals(multiplecharges)

Warm Up(3 mins max)Using a periodic table, find the charges for the these ions:IonChargeMgClNaOSiPS How many Na ions would be needed to cancel out thecharges on one P ion?

Where We’re Headed . How many moles of Al atoms are needed to combine with1.58 mol of O atoms to make aluminum oxide?MATH MATH MATH!!!

Formulas forIonic Compounds Remember that a chemical formula is a code that showsyou the identity and number of elements in thatcompound. Ionic compounds will bond in a ratio that balances the ioncharges of the cation and the anionMgCl2 ALL compounds are neutral

Ionic Compounds REMEMBER - Involve the COMPLETE TRANSFER ofelectrons Three types of IONIC formulas: Binary – Only 2 types of Atoms Ternary (which contain polyatomic ions, p. 7 Ref Tables) Transition Metals -‘B’ group elementsAND Sn -Tin, Pb - Lead

Binary Ionic Compounds Binary compounds have ONLY 2 TYPES OF ATOMS They can have more than 1 of each type Ex. NaCl – Has sodium and chlorineMgBr2 – Has magnesium and bromineNa2O – Has sodium and oxygen

Steps for Writing BinaryFormulasStep1: Find the charges of the element’s ions.Step 2: Swap and drop the ion charges.Step 3: Don’t write ones(as subscripts) or charges(assuperscripts.Step 4: Simplify.Look at the Swap and Drop space/content?q swap and drop

Examples Calcium and seleniumPotassium and IodineMagnesium and FluorineAluminum and OxygenSodium and oxygenStep1: Find the charges of the element’s ions.Step 2: Swap and drop the ion charges.Step 3: Don’t write ones or charges.Step 4: Simplify.WRITE THESE EXAMPLES IN YOURNOTEBOOK! DON’T TRY TO TYPE !!

SHOW YOU KNOW- on White BoardWrite the Chemical Formula for the following: Lithium and Iodine Beryllium and Phosphorus Aluminum and SulfurWhat ions formed the following compounds? InCl3 CaTe

Polyatomic Ions-p. 7 Ref Tables SO4 -2 NH4 1 NO3 -1 CO3 -2 OH -1 PO4 -3

Polyatomic Ions

Polyatomic Ions A polyatomic ion is a group of covalently bonded atomsthat function as a unit.This unit has a single charge Ex: (SO4)2 Same steps as binary compounds plus Step 5: If a subscript is added to a polyatomic ion place theentire polyatomic in ( ) and the subscript outside.REMEMBER! Never EVER change the subscripts in apolyatomic ion (inside the parentheses).LIST ON p. 7NCDPI REFERENCE TABLE

Example Magnesium and HydroxideCalcium AcetateLithium and sulfateMagnesium and NitrateBarium and phosphateWRITE THESE EXAMPLES IN YOURNOTEBOOK! DON’T TRY TO TYPE !!Step1: Find the charges of the element’s ions.Step 2: Swap and drop the ion charges.Step 3: Don’t write ones or charges.Step 4: Simplify.Step 5: If a subscript is added to a polyatomic ionplace the entire polyatomic in ( ).

SHOW YOU KNOW- on White BoardWrite the formula for the following: Lithium and Nitrite Calcium and Hydroxide Ammonium and FluorineWhich ions formed the following compound?Be3(PO3)2

What aboutTransition Metals? Transition metals have multiple charges. Exceptions: Zn is always 2 , Ag is always 1 (KNOW THESE) In the name of the compound the charge on theTRANSITION METAL will always be represented as a RomanNumerale.g. I,II, IV REMEMBER these are METALS and the charge is alwayspositive. We will also use this naming method with Lead, Pb; Tin, Sb

Example Iron (III) and ChlorineYttrium (I) and OxygenIron (III) and ChlorineZinc NitrateWRITE THESE EXAMPLES IN YOURNOTEBOOK! DON’T TRY TO TYPE !!Step1: Find the charges of the element’s ions.Step 2: Swap and drop the ion charges.Step 3: Don’t write ones or charges.Step 4: Simplify.

SHOW YOU KNOW- on White BoardWrite the chemical formula for the following compounds: Copper (II) and Oxygen Cobalt (I) and Sulfur Yittrium (II) and BromineWrite the ions used to form this compound: NiO

SHOW YOU KNOWMIXED REVIEW -- IndependentWrite the ionic formula for compounds containing:(1) Beryllium and Nitrogen(2) Copper(II) and Phosphorus(3) Magnesium and Sulfate(4) Cobolt (III) Nitrate(5) Ammonium Sulfite

Ticket Out:ON ½ SHEET OF NOTEBOOK PAPER Show You Know by writing the chemical formula for acompound formed between:(1) The Alkaline Earth Metal in Period 4 and Hydroxide(2) Nickel (II) and Metalloid in Group 15 with smallest atomicradius(3) [Kr]5s1 and [Ar]4s23d104p4

Naming Compounds / Writing Formulas / Mole Math / % Composition / Empirical & Molecular Formulas . Steps for Writing Binary Formulas Step1: Find the charges of the element’s ions. Step 2: Swap and drop the ion charges. Step 3: Don’t write ones(as subscripts) or charges(as