Asked by Andrea
I am given the following information:
Lactic acid................0.025M...................pH 2.74
How do I calculate the pKa? I don't know how to do it without the concentration. Help please!
Lactic acid................0.025M...................pH 2.74
How do I calculate the pKa? I don't know how to do it without the concentration. Help please!
Answers
Answered by
bobpursley
dissociation: lactic acid>>>H+ + act-
ka= x*x/(.025-x)
but you know x=10^-2.74=.001819
ka= .001819^2/(.025-.001819)=.001819^2/0.023181= 0.000142735904=10^-3.85
pKa= 3.85
check my math
ka= x*x/(.025-x)
but you know x=10^-2.74=.001819
ka= .001819^2/(.025-.001819)=.001819^2/0.023181= 0.000142735904=10^-3.85
pKa= 3.85
check my math
Answered by
Andrea
Thank you so much!!!
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