Ionic Bonding Naming Salts Ionic Bonds An ionic

Ionic Bonding Naming Salts

Ionic Bonds An ionic bond is a very strong attraction between a positive cation and a negative anion. + Na Cl -

Crystal Lattice Structure The ions organize themselves in a pattern of alternating charge called a crystal lattice. The strong attractions cause ionic compounds (salts) to have high melting and boiling points.

Balancing Charges For most compounds to be stable, they must have a neutral overall charge. 2+ Mg 2 S If necessary, add ions to balance charges. 2+ Mg 1 F 1 F

Chemical Formulas Once bound as a salt, write the elements with the cation then anion symbols and no spaces or charges. 2+ Mg + 2 S → Mg. S

Coefficients and Subscripts If a compound requires more than one ion, you write a subscript after the element. 2+ Mg + 11 F +F → Mg. F 2 Coefficients indicate that you must multiply the species by that number. 2+ Mg + 2 F → Mg. F 2

Cross-Balancing Charges For compounds that have multiples of each atom, you can cross the charges as coefficients (then subscripts). 3+ Al + 3+ 2 Al 2 O + →? 23 O → Al 2 O 3

Balancing Compounds Practice 1) What compound would be formed when the following ions bond? 2+ Ca A) B) C) Ca. Cl Ca 2 Cl Ca. Cl 2 1 Cl

Balancing Compounds Practice 2) What compound would be formed when the following ions bond? 1+ K A) B) C) KP K 3 P KP 3 3 P

Balancing Compounds Practice 3) What compound would be formed when the following ions bond? 3+ Fe A) B) C) Fe 2 O 3 Fe. O Fe 3 O 2 2 O

Naming Compounds The compounds are named as they are written, not including subscripts. Mg. S magnesium sulfide Al. F 3 aluminum fluoride

Naming Compounds Practice 4) What is the name of the salt, Ag. Cl? A) B) C) D) silver chlorine silver chlorate silver chloroxide silver chloride

Naming Compounds Practice 5) What is the name of the salt, Ba. O? A) B) C) D) barium oxide boron oxide baride oxygen barium oxygen

Naming Compounds Practice 6) What is the name of the salt, Al 2 S 3? A) B) C) D) aluminum trisulfite aluminum sulfate aluminum sulfide aluminum (II) sulfide

Writing Compounds from Names Translate the name of each ion into the symbol form based on valence electrons. sodium phosphide 1+ Na Add coefficients to balance charges. 1+ 3 Na 3 P 3 P → Na 3 P Rewrite as the chemical formula.