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Berechnen Sie acid dissociation constant Ka aus equilibrium concentrations. Kostenloser chemistry tool.
M
M
M
Ka
0.000167
pKa3.78
Ka vs [H+] at Equilibrium
Formel
## How to Calculate Ka ### Formula **Ka = [H+][A-] / [HA]** For the equilibrium: HA <-> H+ + A-
Lösungsbeispiel
At equilibrium: [H+]=0.004, [A-]=0.004, [HA]=0.096 M.
- 01Ka = (0.004 × 0.004) / 0.096
- 02Ka = 0.000016 / 0.096
- 03Ka = 1.67 × 10^-4
- 04pKa = -log10(1.67 × 10^-4) = 3.78
Häufig Gestellte Fragen
What is Ka?
The acid dissociation constant measures the strength of a weak acid. Larger Ka means stronger acid (more dissociation).
What is pKa?
pKa = -log10(Ka). Lower pKa means stronger acid. It is more convenient for comparing acids.
Do strong acids have Ka values?
Strong acids fully dissociate, so their Ka is very large (effectively infinite). Ka is mainly used for weak acids.
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