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Henderson–Hasselbalch Equation Using Log Acidity Constant

The Henderson–Hasselbalch equation describes the derivation of pH as a measure of acidity (using pKa, the negative log of the acid dissociation constant) in biological and chemical systems.

The pH equals the base 10 logarithm of the ratio between the base concentration and the acid concentration plus the log acidity constant.

Formula

QuantityVariable["pH", "Unitless"] == Log[QuantityVariable["[B]", "Molarity"]/QuantityVariable["[HA]", "Molarity"]]/Log[10] + QuantityVariable[Subscript["pK", "a"], "Unitless"]

symbol description physical quantity
pH pH "Unitless"
[B] base concentration "Molarity"
[HA] acid concentration "Molarity"
pKa log acidity constant "Unitless"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Henderson\[Dash]Hasselbalch Equation Using Log \ Acidity Constant"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ ResourceObject[ "Henderson\[Dash]Hasselbalch Equation Using Log Acidity Constant"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Henderson\[Dash]Hasselbalch Equation Using Log Acidity Constant"], \ {QuantityVariable["[HA]","Molarity"] -> Quantity[0.75`, ("Moles")/("Liters")]}]
Out[3]=

Source Metadata

  • Creator:
  • Date: 1908

Publisher Information