316 Q5

ndifranco94's version from 2015-09-10 04:19


Question Answer
Bronsted acidproton donor
Bronsted baseproton acceptor
Lewis acidelectron acceptor
Lewis baseelectron donor
Gd-DOTA acidGd+3
pH =- log[H+]
pOH =- log[OH-]
K =[products]/[reactants]
K for a monoprotic acid for change in conc of xK = x^2/(C-x)
lower pKb meansstronger base
pKb =-log(Kb)
Conjugate acid-base pairKw = KaKb
Buffercompounds or mixture of compounds that, by their presence in the solution, resist changes in pH upon the addition of small quantities of acid or base
Buffer is made of a combination ofweak conjugate acid-base pairs
pH equation for weak acid bufferpH = pKa + log[Salt]/[Acid]
pH equation for weak base bufferpH = pKb + log[Base]/[Salt]
Buffer capacityBeta = del(conc)/del(pH), magnitude of resistance of a buffer to pH changes
Why use phosphate as a buffer?pKa2 = 7.2, which is close bodily 7.4
In body, buffer solutionsH2CO3, H3PO4
Most body pH7.4
Urine pH6.0
Buffer usesOpthalmic solns, Parenteral solns, Aerosol aolns
If small volume injectiondon't need buffer b/c blood acts as buffer

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