Which is stronger? Ethanoic acid or 'Tris' acid?
how does the parameters of pKa and Ka determine which is stronger?
Answer:
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.
pka is stronger
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+]
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Answer:
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.
pka is stronger
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+]
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