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Ionic compound

Bonding General concepts

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Bonding ? General Concepts Electronegativity: The ability of anatom in a molecule to attract shared electrons to itself. Ionic Bonds Electrons are transferred Electronegativity differences are generally greater than 1.7 The formation of ionic bonds is always exothermic! Determination of Ionic Character Compounds are ionic if they conduct electricity in their molten state Electronegativity difference is not the final determination of ionic character Coulomb?s Law ?The energy of interaction between a pair of ions is proportional to the product of their charges, divided by the distance between their centers? There will be a negative sign on the Energy once calculated?it indicates an attractive force so that the ion pair has lower energy than the separated ions.

Solubility Equilibria

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Solubility Equilibria Ch. 15 part 2 15.6 Solubility: amount (usually ________ ) of ________ that can dissolve in a given amount (usually __________) of ___________ Solubility of ionic compounds: table (from summer assignment) Dissolving reactions of ionic compounds: soluble compounds: dissociate ____________ into ions (_________ arrow reaction) ex. slightly soluble or insoluble compounds: dissociate __________ into ions (_______ arrow reaction) equilibrium constant: Ksp (________________________ constant) = Note: size of Ksp does NOT necessarily indicate size of solubility! Solubility must be ____________. *calculate Ksp from solubility *calculate solubility from Ksp HW: Ch. 15 Q. 81, 85, 89
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