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BR Chem Ch3

Flashcards from chapter 3 of Berkley Review's chemistry book (2010)

QuestionAnswer
Keq Keq = [products]/[reactants]
Catalyst effect on reaction rates Catalysts lowers activation energy so it speeds up both the forward and reverse reaction equally
Factors that can affect Keq Temperature
atm to torr conversion 1atm = 760torr
Complex equilibrium If overall equation is sum of two equations, Keq=K1*K2
Equilibrium in flasks Fixed volume, pressure varies
Equilibrium in pistons Fixed pressure, volume varies
Exothermic and deltaH deltaH < 0
Endothermic and deltaH deltaH > 0
Isothermal No change in temperature during the reaction
Adiabatic No change in heat during the reaction
Dissolving Breakdown of intermolecular forces between molecules as a solid becomes a solute
Dissociation Breakdown of ionic bonds between atoms within a lattice structure as a salt turns into a solute
Solvent Species in greatest concentration
Solute Species not in highest concentration
Solubility A measurement of the degree of dissolving that a solute undergoes within a particular solvent
Saturated No more solid can dissolve into solution
Supersaturated Amount of solid that is dissolved is beyond the maximum amount at a given temperature. First heat a solvent, then add solute until saturated, then slowly cool
Solubility product (Ksp) Equilibrium constant for a dissociation reaction
Molar solubility Maximum number of moles of solid that can dissolve into enough solvent to make one liter of solution under standard conditions. This is what you use to compare solubilities
Gram solubility Maximum number of grams of solid that can dissolve into enough solvent to make one hundred milliliters of solution under standard conditions
Common ion effect Presence of an ion that is also present in the solid... lowers solubility
Comparing solubility Use molar solubility, not Ksp (unless Ksp has same units)
Conditions that make acidic salts most soluble Basic solutions
Conditions that make basic salts most soluble Acidic solutions
Temperature effects on density Lowers density
Temperature effects on molarity Lowers molarity
Created by: kcurtiss