WRITING NAMES & FORMULAS FOR ACIDS, BASES, & GASES Textbook Pages:

Acids Acids are ionic compounds where hydrogen is the positive ion. They ionize (come apart) in water (aqueous – aq) and release a hydrogen ion (H + ). They can bond with non-metals to make binary acids. They can bond with polyatomics to make oxy acids (MORE ON THIS LATER).

Naming Binary Acids Binary acids involve bonding hydrogen ionically with a non-metal. They are named using a pattern. Examples: HCl (aq) – Hydrochloric acid H 2 S (aq) – HCl (g) – Hydro ic acid (name of non-metal)

Writing Formulas for Binary Acids Criss-cross the valences because acids are ionic. Hydrogen always has a charge of 1+. Refer to the Periodic Table for the negative ion charge. Examples: Hydroiodic acidH 1+ I 1- HI (aq) Hydrofluoric acid

Bases Bases are ionic compounds where hydroxide is the negative ion. They ionize (come apart) in water (aqueous – aq) and release a hydroxide ion (OH − ). They bond with metals. They can bond with positively charged polyatomic ions (MORE ON THIS LATER).

Naming Bases Bases involve bonding metal ion ionically with a hydroxide ion. They are named using a pattern. Examples: Ca(OH) 2 (aq) – Calcium Hydroxide NaOH (aq) – Fe(OH) 2 (aq) – Metal Name+Hydroxide

Writing Formulas for Bases Criss-cross the valences because bases are ionic. Hydroxide always has a charge of 1-. Refer to the Periodic Table for the positive ion charge. Examples: Lithium HydroxideLi 1+ OH 1− LiOH (aq) Copper (II) Hydroxide

Naming & Writing Formulas for Gases There are two types of gases: 1. Monoatomic (one atom) – Noble Gases Examples: He (g) – Helium gas Argon gas – Ar (g) 2. Diatomic (two atoms) – MEMORIZE!!! I 2 (g) – iodine gas Br 2 (g) – bromine gas Cl 2 (g) – chlorine gas F 2 (g) – fluorine gas O 2 (g) – oxygen gas N 2 (g) – nitrogen gas H 2 (g) – hydrogen gas I Bring Clay For Our New House ORH Br O N Cl I F

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