pKa Calculator
Calculate pKa from Ka, Ka from pKa, or find the acid dissociation constant using pH and concentration.
Ka
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Result
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Calculation Breakdown
Step-by-step pKa/Ka calculation
pKa
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Acid strength
Ka
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Dissociation constant
pH
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Acidity
Acid
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Substance
pKa/Ka Formulas
Key acid-base concepts
pKa Tips
Understanding acid strength
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Chemical Disclaimer: This pKa calculator uses the relationship pKa = -log₁₀(Ka). Lower pKa values indicate stronger acids. For weak acids, Ka values are typically between 10⁻¹⁶ and 10⁻¹.