Mastering Binary Ionic Compounds and Polyatomic Ions: Naming and Formulas
This guide covers essential rules for naming binary ionic compounds and polyatomic ions, crucial for chemistry students. Understand how to name simple cations and anions by applying systematic naming conventions, including the use of Roman numerals for elements with multiple charges. Learn to differentiate between –ite and –ate endings and utilize prefixes for identifying polyatomic ions. With practice exercises, you will reinforce your skills in writing both names and formulas for various ionic compounds, helping to solidify your understanding of ionic bonding concepts.
Mastering Binary Ionic Compounds and Polyatomic Ions: Naming and Formulas
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Presentation Transcript
Ch. 5Ionic Bonding Naming Section 3
Need to Know • BinaryIonic Compounds • Binary – indicates that the compound is made up of just two elements
Rules for Naming Ions • Simple Cations • Borrow names from names of elements • Examples • K+ → potassium ion • Zn2+ → zinc ion
Rules for Naming Ions • Elements that form two or more ions • Use Roman #’s • Examples • Cu+ → copper (I) ion • Cu2+ → copper (II) ion
Rules for Naming Ions • Simple Anions • Formed from name of element, but it ends in –ide • Examples • Cl-→ chloride ion • O2-→ oxide ion • P3-→ phosphide ion
Naming Binary Ionic Compounds • The cation is always named first • Examples • NaCl→ SodiumChloride • ZnS→ ZincSulfide • K2O→ PotassiumOxide • CuCl2→ Copper (II)Chloride
Polyatomic Ions • poly – “many” • an ion made of two or more atoms • can be treated as a single ion charge is not found on a single atom
Polyatomic Ions • Endings • Contains oxygen • ends with –ite or –ate • -ite “less oxygen” • -ate “more oxygen” • Examples • Nitrate – NO3- • Nitrite – NO2-
Polyatomic Ions • Prefixes • mono – “one” • di – “two” • thio – “replace oxygen with sulfur” • Examples • monohydrogen phosphate HPO42- • dihydrogen phosphate H2PO42-
Ch. 5Ionic Bonding Practice Section 5.3
N3- Fe3+ Mg2+ Ca3N2 FeI3 Na2O AlCl3 SrO CuCl2 Al2S3 PracticeWrite the names for the following:
PracticeWrite the formulas for the following: • Copper (II) oxide • Sodium fluoride • Zinc chloride • Aluminum sulfide • Potassium nitride
Practice Write the formula for he following: Write the name for the following: Ca(NO3)2 CuSO4 CuNO3 Na2CO3 K2Cr2O7 • Aluminum nitrate • Ammonium phosphate • Ammonium acetate • Potassium permanganate
Homework Section Review 5.3 #’s 5 - 8
