Chem Self Notes 9-15-09

Chem Self Notes 9-15-09 - Give symbols and charges of...

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Give symbols and charges of following monatomic anions: a) Nitride-N ^3- b)fluoride-F^- b) Oxide-O^2- d)iodide-I^- e) Sulfide S^2- f)phosphide-P^3- Give symbols and charges of the following polyatomic oxoanions: a) Nitrite- NO2^- b)sulfate-SO4^2- b) Sulfite-SO3^2- d)nitrate NO3^- Name the following polyatomic oxoanions: a) PO4^3-:phosphate b)CO3^2-:carbonate b) ClO4^-:perchlorate d)ClO^- hypochlorite For each of the following ionic compounds, give the formula, charge, and the number of each ion that makes up the compound: a) K2S work: 2K^+ S^2- b) (NH4)3PO4 work: 3NH4^+ PO4^3- b) CoSO4 work: Co^2+ SO4^2- d) Ca(ClO)2 work: Ca^2+ 2ClO^- c) KMnO4-potassium permanganate Work: K+ MnO4^- f)CuCO3 work: Cu^2+ CO3^2- What charges are most commonly observed for monoatomic ions of the following elements? a)selenium Se^2- b)chlorine Cl^- c) nitrogen N^3- d)gallium Ga ^3+ e)Calcium Ca ^2+ f) potassium K+ Atoms, Molecules, and Ions Ions: Cations and Anions When neutral atoms lose or gain electrons, they become ions. Electrons are transferred to an atom of another element. When atoms lose or gain electrons, they become ions. Cations are positive and are formed by elements on the left side of periodic chart Anions are negative and are formed by elements on the right side of the chart In nomenclature, take stem of work and “ide” Electrostatic Forces Ionic compounds are held together by electrostatic forces. As ion charges increase, force of attraction goes up. As distance increases, force of attraction decreases Coulomb’s Law The energy associated with electrostatic interactions is governed by Coulomb’s law: F=k(Q1Q2/d2) The force of attraction between oppositely charged ions increases As the ion charges (n^+ and n^-) increase. As the distance between the ions.
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