Using the ICE method for neutralisation Mols Propanoic acid Mols NaOHMols Propanoate Initial (I)0.0113625 x10 -3 x.108 =.0027 0 Change (C)-0.0027.

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Presentation transcript:

Using the ICE method for neutralisation Mols Propanoic acid Mols NaOHMols Propanoate Initial (I) x10 -3 x.108 = Change (C) Equilibrium (E) Concentration = L c propanoic acid = molL -1 c propanoate = molL -1 pH = pKa + log [base] [acid] = log = log = = 4.36

Strong base- strong acid Strong base- weak acid Strong acid- weak base Weak base – weak acid pH at EP 7  8 8 8 8 5555 7777 Length of vertical region Long (  8 pH units) Short (  3 pH units) Not present pH at start 1111 3333  11 3333 Buffer zone Not present presentpresent 2 present

Volume Conc. Moles