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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: bindy on November 04, 2009, 02:01:43 PM

Title: ethanoic acid titration
Post by: bindy on November 04, 2009, 02:01:43 PM

can any one help, have to determine the pKa of ethanoic acid using the following three methods, pH=pHa (half neutralisation point-4.5) pH=1/2(pKa-log10Ca)( initial pH-2.69)
pH=1/2pKa+1/2pKw+1/2log10Cs(end point equalisation-8.8) sorry need urgent help on this, just feel like giving up, aaaaaaaarrrrrrrrrrrhhhhhhhhhhhh, thanks

Title: Re: ethanoic acid titration
Post by: uq on November 04, 2009, 02:51:19 PM

Hi,

You could try plotting a titration curve graph of pH against volume, then estimate the pK_a from the point of half neutralisation.