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IB Chem Acids HL

QuestionAnswer
Lewis acid Electron pair acceptor. Electrophile.
Buffers solutions which resist changes in pH when small quantities of acid or alkali are added. A weak acid/base and its salt.
Equivalence point (stoichiometric point) Volume, exact point at which the solution is neutralized for the given acid (solution may not actually be neutral), [H+] = [OH-]
Endpoint pH range at which an indicator changes colour
Half-equivalence point point in the graph where half of the acid has been neutralized and turned into a salt. Gives pKa of the weak acid or weak base.
Lewis base Electron pair donor. Nucleophile.
Formula for converting pOH and [OH-] [OH-] = 10^-pOH
Formulae for converting Ka and pKa Ka = 10^-pKa, pKa = -log Ka
Formulae for converting Kb and pKb Kb = 10^-pKb, pKb = -log Kb
Formula for converting between Ka and Kb Kw = Ka x Kb
Formula for converting between pKa and pKb pKw = 14 = pKa + pKb
Buffer equation (Henderson-Hasselbalch) pH = kPa + log [A-]/[HA]
Indicator weak acids or bases which have a different colour to their conjugate base or acid
Created by: andrewweng0406
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