Day 8 – Ionic compounds with transition metals Sci 10 Chemistry

Ionic compounds with a transition metal: Many of the transition metals (in the centre of the periodic table) are able to form more than one cation. i.e.: Copper can form the cations Cu 1+ , and Cu 2+ Iron can be Fe 2+ or Fe 3+

Roman Numerals *on the back of your periodic table! II = 2 III = 3 IV = 4 V = 5 VI = 6

Ionic compounds with transition metals –Nomenclature (naming) Name to formula: i.e. : copper (I) chloride Write the elements’ symbols Make a table and draw circles with the charges of each ion. (The charge for the transition metal is given in brackets in the name) If the charges cancel (add to zero), you are done  The formula is: CuCl

Ionic compounds with transition metals –Nomenclature (naming) If the charges do not add to zero: i.e. : iron (II) chloride Fe Cl Keep adding atoms until they do FeCl2

The charges add to zero so the answer is: Give it a try! What is the formula for: osmium (II) sulfide Os S 2+ 2- The charges add to zero so the answer is: OsS

Give it a try! What is the formula for: nickel (III) fluoride Don’t forget that the III (3) in the brackets tells us the charge of nickel Ni F 3+ 1-

Ionic compounds with transition metals –Nomenclature (naming) Formula to name: The charge of the transition metal is written in brackets using Roman numerals if there is more than one possible charge i.e. Fe2O3 iron… (II or III?) Make the table and find out the charge of the transition metal Write the name of the cation (+) Write the charge next to the name of the cation in brackets (use Roman numerals) Write the name of the anion with the ending –ide. iron (III) oxide

Give it a try! Mn3F6 The name is: manganese …. (II or IV?) Manganese(II) fluoride

Ionic compounds with transition metals –Nomenclature (naming) PbO2 lead… (II or IV?) Lead (IV) oxide

Careful! We NEVER use Roman numerals for metals with one charge! Look at your Periodic Table: Which transition metals only ever have ONE charge? Scandium, zinc, silver, etc. Do NOT use Roman numerals for these metals! Ex: ZnO

To do: Day 8 Practice– Ionic Compounds with a Transition Metal