Henderson-Hasselbach Equation

#Chemistry #Biochemistry

$\displaystyle \mathrm{pH=pK_{a}}+\log\left( \frac{[A^{-}]}{[HA]} \right)$

• Works when inside the buffer region of a titration ($\displaystyle \pm 1\ce{,pH}$ of the $\displaystyle \mathrm{pKa}$)

$\displaystyle \begin{cases}\nabla\times\vec{E}=-\frac{\partial\vec{B}}{\partial t}\\nabla\times\vec{H}=\vec{J_v}+\frac{\partial\vec{D}}{\partial t}\\nabla\cdot\vec{D}=\rho_v\\nabla\cdot\vec{B}=0\end{cases}\quad ,\begin{cases}\vec{D}=\epsilon\vec{E}\\vec{B}=\mu\vec{H}\\vec{J_v}=\sigma\vec{E}\end{cases}$