CHEMISTRY / ACID-BASE CHEMISTRY
Estimate buffer pH from acid pKa and the conjugate-base to acid concentration ratio. Inspect the chemical relationship, substituted values, result, assumptions, and unit convention in one guided workspace.
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Estimate buffer pH from acid pKa and the conjugate-base to acid concentration ratio. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
pH = pKa + log10([A-]/[HA])
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What you receive
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Activities are approximated by concentrations and the solution must behave as a weak-acid buffer.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors