Binary Molecular Compounds Binary Molecular Compounds Binary molecular
Binary Molecular Compounds
Binary Molecular Compounds • Binary molecular compounds are composed of two different nonmetals – examples: CO, SO 2, N 2 H 4, P 4 Cl 10 • These compounds are named by using a prefix to indicate the number of atoms of each element present (see table in notebook ).
H 2 O • Dihydrogen Monoxide
• The prefix mono- is often omitted especially when the first element would have the prefix mono. CO • (example: CO is named carbon monoxide, not monocarbon monoxide).
Name the following compounds: NF 3 N 2 O 4 P 4 S 10 • NF 3 is nitrogen trifluoride • N 2 O 4 is dinitrogen tetroxide (Note: dropped an 'a') • P 4 S 10 is tetraphosphorous decasulfide
Write formulas for the following compounds: • dichlorine heptaoxide • carbon hexasulfide • octaphosphorous pentaoxide • dichlorine heptaoxide is Cl 2 O 7 • carbon hexasulfide is CS 6 • octaphosphorous pentaoxide is P 8 O 5
Acids
Acids • Acids are compounds that give off hydrogen ions, (H+) when dissolved in water. When a compound has hydrogen as its cation the substance is generally an acid – Examples: HCl, H 2 SO 4, H 3 PO 3 • The rules for naming acids are based on the anion portion of the acid formula.
Rules for Naming Acids • The names of acids are based on the ending of the anion name. – Examples: HCl, H 2 SO 4, H 3 PO 3
Rules for Naming Acids • The names of acids are based on the ending of the anion name. – Examples: HCl, H 2 SO 4, H 3 PO 3 • Cl‾ = chloride
Rules for Naming Acids • The names of acids are based on the ending of the anion name. – Examples: HCl, H 2 SO 4, H 3 PO 3 • Cl‾ = chloride • SO 42‾ = sulfate
Rules for Naming Acids • The names of acids are based on the ending of the anion name. – Examples: HCl, H 2 SO 4, H 3 PO 3 • Cl‾ = chloride • SO 42‾ = sulfate • PO 33‾ = phophite
Rules for Naming Acids
Name the acids • HNO 2 nitrous acid • HCN hydrocyanic acid • H 3 PO 4 phosphoric acid
Write formulas for the following acids • chromic acid H 2 Cr. O 4 • hydroiodic acid HI • chlorous acid HCl. O 2
Homework • Do the 4 “HOMEWORK” (Not example) problems on the Binary Molecular Compounds and Acids note page. – Do these problems on your own paper. – Homework will be collected tomorrow.
- Slides: 16