Unit 6: Nomenclature - Part III Ionic Compounds Unit 6: Nomenclature - Part III

How do I name an ionic compound with a transition element? Lesson Essential Questions: How do I name an ionic compound with a transition element? How do I write a formula for an ionic compound with a transition element?

Writing Names of Binary Ionic Compounds with a transition element +4 -4 -1 = 0 Ex. TiCl4 The cation charge is what is used for the Roman Numeral in the name. Overall charge needs to be zero. What charge can Ti be to give a overall net zero charge? What is the charge of the nonmetal? Titanium (IV) Chloride 1. Write the Name of the first element (cation) as is. 2. Change the ending of the second element (anion) to –ide. Work backwards from the nonmetal to figure out what the charge of the cation is and that is the Roman Numeral that is used in the name.

Writing Names of Binary Ionic Compounds with a transition element +6/2 +6 +3 -6 -2 = 0 Ex. Fe2S3 Overall charge needs to be zero. What charge can Fe be to give a overall net zero charge? BUT…..this time there are two iron atoms so the +6 charge needs to be divided equally therefore each Fe will have a +3 charge. Iron (III) Sulfide BUT….there are three S atoms therefore the overall charge is -2(3) which is a -6. What is the charge of the nonmetal? 1. Write the Name of the first element (cation) as is. The cation charge is what is used for the Roman Numeral in the name. 2. Change the ending of the second element (anion) to –ide. Work backwards from the nonmetal to figure out what the charge of the cation is and that is the Roman Numeral that is used in the name.

Writing Names of Polyatomic Ion Compounds with a transition element +2 -1 -2 = 0 Ex. Ti(ClO4)2 Overall charge needs to be zero. What charge can Ti be to give a overall net zero charge? What is the charge of the anion? The cation charge is what is used for the Roman Numeral in the name. Titanium (II) Perchlorate 1. Write the Name of the first element (cation) as is. 2. Write the name of polyatomic ion remembering NOT to change the ending.. Work backwards from the anion to figure out what the charge of the cation is and that is the Roman Numeral that is used in the name.

Writing Ionic Formulas containing transition elements. Ex. Copper (I) Chloride Write the formula for the anion and cation including the charges. The Cation gets its’ charge from the Roman Numeral. 2. Check to see if the charges are balanced. +1-1= Net charge of zero which means it is balanced. Cu+1 Cl-1 CuCl

Writing Ionic Formulas Containing Transition Elements Ex. Mercury (II) Nitrate Write the formula for the anion and cation including the charges. Remember Cation gets its’ charge from the Roman Numeral. 2. Check to see if the charges are balanced. +2-1= Net charge of +1 which means it is NOT balanced and will need a subscript and parenthesis. Hg+2 NO3-1 Hg(NO3)2 2 Not Balanced