which is stronger? Ethanoic acid or 'Tris' acid?

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which is stronger? Ethanoic acid or 'Tris' acid?

how does the parameters of pKa and Ka determine which is stronger?

2007-07-02 04:17:20 · 3 answers · asked by sharen s 2 in Science & Mathematics ➔ Chemistry

3 answers

The higher Ka will be stronger. Ethanoic has a Ka=1.8 x 10-5 and a pKa of 4.7. As the Ka goes higher, the pKa will go lower. This represents greater acid strength and a lower buffering region.

2007-07-02 04:27:43 · answer #1 · answered by serf_tide 4 · 0⤊ 0⤋

The acid with the larger Ka is stronger, or since pKa is defined from Ka, the smaller pKa. Ka, for a slightly dissociated acid HA, is approximately
[H+]^2/[HA]
For acids with the same concentration, the higher the Ka, the higher the [H+]

2007-07-02 11:27:27 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋

pka is stronger

2007-07-02 11:22:56 · answer #3 · answered by Anonymous · 0⤊ 0⤋