Ionic Compounds Determine the number of subatomic particles

Ionic Compounds

Determine the number of subatomic particles in the following elements: ¡Cl has a mass of 35 and an atomic # of 17 ¡p+ = 17, no = 18, e- = 17 ¡K has a mass of 39 and an atomic # of 19 ¡p+ = 19, no = 20, e- = 19

Write the formula of each of the following ionic compounds ¡Silver nitrate ¡Sodium oxalate ¡Magnesium hydroxide ¡Silver acetate

Forming Ionic Compounds w/ Variable Oxidation Numbers ¡Some elements (metals) can have more than one possible charge when they form ions ¡Use Roman Numerals to indicate their charge Example: Copper(II) Sulfate Chromium(III) Oxalate

Notes Naming ¡Left Right. Ionic Compounds ¡Left Side: ¡Name the metal (cation) ¡If it is variable, you must use a roman numeral to indicate its oxidation number/charge ¡Right Side ¡If polyatomic and on your reference chart, write the name ¡If monatomic, write the name of the element but change the ending to “-ide”

Practice ¡Write the name of each of the following compounds ¡Ag. Br ¡Ca 3(PO 4)2 ¡Li. H ¡Ra. Cl 2

Notes Naming Ionic Compounds w/ Variable Oxidation Numbers ¡Start with what you know! (the anion) ¡Calculate the total anion charge ¡An ionic compound is neutral (no charge) so…. Total anion charge = Total cation charge ¡Calculate the charge of the individual cation ¡Name the compound by giving the cation a roman numeral to represent its oxidation number (charge)

Naming Ionic Compounds w/ Variable Oxidation Numbers Example: Cu 2 S Ni(OH)2

Name the compound Bi. I 3 Co. Br 2

Cu 2 S Cu. S

Ionic Compounds Lab ¡Review: signs of a chemical reaction

Ionic Compounds Lab ¡Goggle safety ¡Dropper safety ¡Silver Nitrate – Sodium hydroxide safety ¡Equation set-up ¡Double Displacement Reactions ¡Clean Up

Wrap Up ¡What does the roman numeral tell you in an ionic compound? ¡Assignment: Finish writing out all the reactions